List of commercial video games with available source code
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Commercial video games are typically developed as proprietary closed source software products, with the source code treated as a trade secret (unlike open-source video games). When no more revenue is expected, these games may enter their end-of-life as a product with no support or availability for the game's users and community, becoming abandonware.
In several of the cases listed here, the game's developers released the source code expressly to prevent their work from becoming abandonware. Such source code is often released under varying (free and non-free, commercial and non-commercial) software licenses to the games' communities or the public; artwork and data are often released under a different license than the source code, as the copyright situation is different or more complicated. The source code may be pushed by the developers to public repositories (e.g. Sourceforge or GitHub), or given to selected game community members, or sold with the game, or become available by other means. The game may be written in an interpreted language such as BASIC or Python, and distributed as raw source code without being compiled; early software was often distributed in text form, as in the book BASIC Computer Games. In some cases when a game's source code is not available by other means, the game's community "extracts" source code from compiled binary files through time-demanding reverse engineering techniques. Source code availability in whatever form allows the games' communities to study how the game works, make modifications, and provide technical support themselves when the official support has ended, e.g. with unofficial patches to fix bugs or source ports to make the game compatible with new platforms.
Games with released source code
|Title||First release||Source code release||Genre||Engine license||Content license||Original developer||Additional information|
|A Dark Room||2013||2013||Online text-based role-playing game||Mozilla Public License||Mozilla Public License||Doublespeak Games||In July 2013 the source code of the game was put on GitHub under MPL 2.0. Became commercially successful after the source code release.|
|Abuse||1995||2003||Run and gun||Public domain software||Public domain and Proprietary*||Crack dot Com||Game source code was released as public domain along with the shareware-released media files. Only shareware data, excluding the sound effects, is in the public domain; the rest is proprietary. In 2016 a community developer released a "20th anniversary source port" which enabled custom resolutions, OpenGL rendering, Xbox 360 controller support and fixed the music.|
|Adventureland||1978||1980||Text Adventure game||Public domain software||Public domain||Scott Adams||Scott Adams Adventureland's source code was published in SoftSide magazine in 1980 and the database format was subsequently used in other interpreters such as Brian Howarth's Mysterious Adventures series.|
|Airline Tycoon||1998||2015||Simulation game||proprietary||Commercial||Spellbound Entertainment||On 24 March 2015 Airline Tycoon Deluxe was re-released on the digital distribution platform gog.com, including the source code.|
|Alien Bash I+II||1993||2014||Run and gun||public domain software||public domain||Glen Cumming||Glen Cumming provided media and material of his Amiga games "AlienBash" and "AlienBash II" to the fan community, who was able to restore source code in 2014.|
|Alien Breed 3D II: The Killing Grounds||1996||1997||FPS||?||Proprietary||Team17||Team17 made the game's source code (and its predecessor Alien Breed 3D) freely available in March 1997, on the cover CD of Amiga Format magazine issue 95.|
|Aliens versus Predator||2000||2001||FPS||Own non-commercial license||Proprietary||Rebellion Developments||Source code released by Rebellion Developments 2001. An unofficial patch project for the PC version, based on the source code, was released and is still updated.|
|Alpha Waves||1990||2009||early 3D exploration game with platform aspects||?||?||Christophe de Dinechin||Released in 1990 as one of the earliest 3D games with full 6-axis degree of freedom. In 2009, author Christophe de Dinechin released the complete assembly and GFA BASIC source code of the Atari ST version. There is also a started PC port in C++ on sourceforge by the author.|
|Akalabeth: World of Doom||1979||1979||Role-playing video game||public domain||Freeware||Richard Garriott||Richard Garriott distributed the Applesoft BASIC written game originally as source code. Also later Origin Systems offered the source code on their FTP servers.|
|Allegiance (now FreeAllegiance)||2000||2004||real-time strategy and Space combat simulator||Shared Source||Proprietary||Microsoft Research||Released by Microsoft Research under a shared source license ("MSR-SSLA") 2004.|
|Amulets & Armor||1997||2013||first person role-playing video game||GPLv3||Freeware||United Software Artists||In 2013 Amulets & Armor was re-released as freeware on the game's official site and the source code under GPLv3 on Github. Work continues for ports to newer systems (Windows, MacOS) and general bug fixes.|
|Anacreon: Reconstruction 4021||1987||2004||4x game||no license given||Freeware||George Moromisato||Developed by George Moromisato in 1987. Around 2004 the source code of the DOS version 2.00 was released.|
|Ares||1996||2008||Space Strategy video game||LGPLv3||CC BY-NC-SA Freeware||Nathan Lamont/Bigger Planet Software||Released in 2008. Under continued development for modern systems as "Antares" via GitHub.|
|Arx Fatalis (now Arx Libertatis)||2002||2011||RPG||GPL||Proprietary||Arkane Studios||The design of Arx Fatalis was heavily influenced by Ultima Underworld. Game source released by Arkane Studios on January 14, 2011.|
|AstroMenace (now OpenAstroMenace)||2007||2007||Arcade||GPLv3||GPLv3||Viewizard||Based on AstroMenace which was released in February 2007 as shareware for Windows and freeware for Linux.|
|Asylum||1994||2002||Platformer||Public domain software||Public domain software||Andy Southgate||Released by Andy Southgate as public domain and SDL port under GPLv3. Later ported also to the Pandora.|
|Attack of the Mutant Camels||1989||2012||Scrolling shooters||?||?||Jeff Minter||In 2012 the assembly language source code of the Konix version of the game was released on GitHub.|
|Aquaria||2007||2010||Action-adventure||GPL||Proprietary||Bit Blot||Open sourced with Humble Indie Bundle.|
|Avara||1996||2016||Shooter game||MIT license||proprietary||Ambrosia Software / Juri Munkki||The MacOS classic game became open source in 2016 when Munkki released the source code upon the game's 20th anniversary.|
|Aztaka||2009||2011||Action role-playing game||Proprietary||Citérémis||In 2011 Independent game developer Citérémis released a "Developer's Edition" of Aztaka for $9.99 which included also the source code of the game.|
|Barony||2015||2016||Rogue-like||GPLv3||commercial||Turning Wheel||The game was released in June 2015 on Steam and gog.com commercially. Source code was released in June 2016 on github.|
|Batman Returns||1993||2015||sidescrolling Beat 'em up||for educational purposes||for educational purposes||ACME / Chris Shrigley||In March 2015 programmer Chris Shrigley, who worked on the Sega CD version, found the Batman Returns source code and released it for educational purposes to the public. He released also the source code of Magician, Cliffhanger, Gargoyles and some other games from his working career.|
|Beneath a Steel Sky||1994||2003||Point and click adventure||Beneath a Steel Sky Freeware License||Beneath a Steel Sky Freeware License||Revolution Software||The assembly language source code of the game was made available to the public and ScummVM in August 2003. The source code availability made it possible for the ScummVM project to support the game, which allows the game to be played on Windows, OS X, Linux, Windows CE and other compatible operating systems and platforms.|
|Beyond Castle Wolfenstein||1985||2005||Stealth game||no license given||Freeware||Silas Warner||The reconstructed source code and the ported game was released by Silas Warner's widow in 2005.|
|Beyond the Titanic||1986||2009||Text adventure||GPL||GPL||Apogee Software||Game source released on March 20, 2009.|
|Blades of Exile||1997||2007||RPG||GPL||GPL||Spiderweb Software||Source code and artwork was released by Jeff Vogel (Spiderweb Software) under a GPL license in June 2007.|
|Blake Stone: Planet Strike||1994||2013||FPS||GPL||GPL||Apogee Software||Released in 2013 to promote the sale of the Apogee Throwback Pack on Steam.|
|Buzz Aldrin's Race Into Space (now Race Into Space)||1993||2007||Simulation||GPLv2||Freeware||Strategic Visions/Fritz Bronner||A port of Buzz Aldrin's Race Into Space to modern operating systems. The license fell back to Bronner as he had a contract clause with Interplay stating that in case Interplay went bankrupt or no distribution for some time.|
|Catacomb||1989||2014||Top-down shooter||GNU General Public License||Proprietary||Flat Rock Software||Early game by John D. Carmack. Released by Flat Rock Software. and ported to SDL.|
|Catacomb 3D||1991||2014||FPS||GNU General Public License||Proprietary||Flat Rock Software / id Software||Predecessor to Wolfenstein 3D.|
|Call to Power II||2000||2003||turn-based strategy game||Non-commercial own license||Proprietary||Activision||Civilization clone. Source opened to the apolyton community to allow support with Community patches.|
|Canabalt||2009||2010||Cinematic platformer||Engine MIT license, game code own proprietary license||Proprietary/Freeware||Adam Saltsman||Released by Adam Saltsman in 2010.|
|Cart Life||2011||2014||Simulation||CART LIFE'S FREE LICENSE (Permissive license)||CART LIFE'S FREE LICENSE (Permissive license)/Freeware||Richard Hofmeier||In March 2014 the game was removed from all digital distributions and the source code and game was made available for free online, with Hofmeier saying he was finished supporting the game. His webpage went later offline but the source code was mirrored on GitHub.|
|Civilization IV||2005||2006 (partly)||turn-based strategy||proprietary||proprietary||Firaxis Games / 2k Games||In April 2006 the developers released the source code of the core game mechanic to the public with a Software Development Kit. Additionally to the released source code, as game data and rules are stored in XML files and most of the game is written in Python, much (but not all) of the game is "open" and easily customizable.
The game's community produced later many mods, total conversations and optimization patches for the game.
|Clonk||1994||2010||Action, RTS, Platform||ISC||CC-BY||RedWolf Design||Successor of the Clonk shareware series.|
|Colobot||2001||2012||Educational game, RTS||GPLv3||GPLv3||Epsitec SA||Game source released on March 26, 2012.|
|Colossal Cave Adventure||1976||2007||Text Adventure||Public domain software||no artwork (Public domain software)||Will Crowther|
|Commander Keen: Keen Dreams||1991||2014||Platformer||GPLv2+||Proprietary||id Software||In September 2014, after an Indiegogo crowdfunding campaign, the game's source code was released on GitHub.|
|Conquest: Frontier Wars||2001||2013||Space Real-time strategy||?||Proprietary||Fever Pitch Studios||On December 9, 2013, the source code was bundled with every copy of the game purchased on GOG.com.|
|CoreBreach||2011||2012||Racing game||GPL (game)/ MIT (3d engine)||Freeware (demo)/ proprietary||CoreCode||Futuristic "anti-gravity" racing game with combat. Source was released after a sales quota was met.|
|CryEngine 5||2002||2016||FPS||?||NA||Crytek||In 2016 Crytek released their engine as pay-what-you-want including the source code to the public.|
|Crystal Mines||1989||2011||Arcade||Custom permissive license||Freeware||Ken Beckett/Color Dreams||In August 2011 Ken Beckett, the programmer of the NES game Crystal Mines, released the source code under a custom permissive license to the public. Artwork still proprietary but can be shared for non-commercial, personal use.|
|Cylindrix||1995||2001||Arcade, Shooter||LGPL||LGPL||Goldtree Enterprises / Softdisk||Around December 2001 the games was ported from DOS to Windows and released under the LGPL to the public.|
|Cytadela (or The Citadel)||1996||2006||FPS||GPLv2||GPLv2||Virtual Design||In early 2006 the original Cytadela developer offered the Amiga source code of the FPS game to the community, which started a conversation project hosted on sourceforge. Ported to several platforms, latest version released in 2013.|
|Daikatana||2000||2015||FPS||?||Proprietary||Ion Storm / John Romero||Lacking any further official support after the closure of Ion Storm's Dallas office in 2001, John Romero gave the game's source code to community members, allowing them to develop additional platform ports and bug fixes.|
|DarkSpace||2001||2009||MMO, Real-time strategy||multiple, own licenses.||Proprietary||Palestar||DarkSpace's game engine called Medusa released by Palestar under multiple licenses.|
|Descent (now D2X-XL)||1995||1997/1999||space 3D FPS||own license||Proprietary||Parallax Software||Game source released by Parallax Software on 1997 (Descent 1) and 1999 (Descent 2). Descent 3 source code seems to be in hands of Rebecca Heineman and were considered 2014 for a release.|
|Diamond Trust of London||2012||2012||TBS||Public Domain||Public Domain||Jason Rohrer||Following a Kickstarter crowdfunding campaign Diamond Trust of London was developed by Jason Rohrer and published by indiePub. On August 28, 2012 it was released for the Nintendo DS. The game has been placed in the public domain, hosted on SourceForge, like most of Rohrer's games.|
|Digger||1983||2004||Arcade||proprietary||Freeware||Windmill Software||The original source code became available in September 2004 "for historical interest" (together with source code of other Windmill Software games as Styx). There is also an earlier free software reverse engineered variant available by Andrew Jenner, called Digger Remastered, ported for many platforms.|
|Dink Smallwood||1997||2003||Action RPG||Zlib inspired own license||Zlib/Proprietary (Sound)||Robinson Technologies||Source code published on July 17, 2003 from Seth Robinson. 2008 Artwork published (without some sounds) under a Zlib license.|
|Discworld and Discworld II||1995||2008||point-and-click adventure game||?||?||Teeny Weeny Games||First announced for release around 2005 by Terry Pratchett, source code became in 2008 available to the ScummVM developers. The code was fast integrated into ScummVM.|
|DONKEY.BAS||1981||1981||Racing game||Proprietary||Proprietary||Bill Gates, Neil Konzen||Was written by Microsoft co-founder Bill Gates and Neil Konzen in 1981 and was included with early versions of the PC DOS operating system for the original IBM PC. Similar early BASIC games which were distributed as source code are GORILLA.BAS and NIBBLES.BAS.|
|Doom||1993||1997/1999||FPS||GPL||Proprietary||Id Software||Game source released on December 23, 1997, placed under GPL on October 3, 1999.|
|Doom II: Hell on Earth||1994||1997/1999||FPS||GPL||Proprietary||Id Software||Game source released on December 23, 1997, placed under GPL on October 3, 1999.|
|Doom 3||2004||2011||FPS||GPL||Proprietary||Id Software||Game source released on November 22, 2011.|
|Dragonfire||1982||2003||action||public domain software||public domain||Imagic||Source code of this Imagic Atari 2600 game was released by developer Bob Smith on May 24, 2003 into the public domain.|
|DROD series||1997||2000||Puzzle game||Mozilla Public license 1.1 (and other)||Proprietary||Webfoot/Erik Hermansen||After the author reacquired the rights to the game from the original publisher Webfoot, he released the source code of the game engines. The source code releases include DROD: King Dugan's Dungeon, DROD: Journey to Rooted Hold, DROD: The City Beneath, DROD: Gunthro and the Epic Blunder, DROD: The Second Sky, and DROD RPG: Tendry's Tale without its media assets.|
|Duke Nukem 3D||1996||2003||FPS||GPL / Build license||Proprietary||3D Realms / Ken Silverman||Game source released on April 1, 2003. Update builds and source ports like eduke32 followed by the game's community.|
|Dungeons of Daggorath||1982||2001||3D Dungeon crawler||Freeware||Freeware||DynaMicro / Douglas J. Morgan||As for years there has been no production by the publisher Radio Shack of the game, the distributions rights fall back to the developers. Morgan released game around 2001 under a freeware like license to the public, also offering the source code. Following, the game's community has created ports for PC, Linux, RiscOS and PSP.|
|Eat The Whistle||1998||2002||Sports game||GPLv2||GPLv2||Hurricane Studios||A football Simulation video game released for the Amiga. In 2002 released under the GPL and ported to many other platforms.|
|Eldritch||2013||2014||FPS, roguelike||zlib license||Proprietary||Minor Key Games||In April 2014, the game's source code was released to the public under a permissive zlib license. Content still proprietary and game being sold.|
|Elite||1984||1999||Space trading game||?||Freeware||Ian Bell, David Braben||In November 1999, developer Ian Bell released on the game's 15th birthday the BBC Micro assembly source code on his website. Following that, Christian Pinder created a platform-neutral C version from the released BBC Micro version, called Elite: The new kind. In 1999–2000 a dispute occurred between Ian Bell and David Braben regarding Bell's decision to make available all versions of the original Elite. The dispute has since ended and the various versions are now available again on Bell's site.|
|ELIZA (DOCTOR)||1966||1966||Chatbot / Rogerian psychotherapist simulator||public domain software||public domain||Joseph Weizenbaum||ELIZA is an influential video game predecessor written at the MIT Artificial Intelligence Laboratory by Joseph Weizenbaum between 1964 and 1966. Weizenbaum's original MAD-SLIP implementation was re-written in Lisp by Bernie Cosell. A BASIC version appeared in Creative Computing in 1977, written in 1973 by Jeff Shrager. This version, which was ported to many of the earliest personal computers, appears to have been subsequently translated into many other versions in many other languages.|
|Enemy Engaged: RAH-66 Comanche vs. KA-52 Hokum||2000||2003||Helicopter Flight simulator||own license||Proprietary||Razorworks||Game source was released somewhen 2003 by Razorworks.|
|Enemy Nations||1997||2005/2006||RTS||own non-commercial license||non-commercial Freeware||Windward Studios||Game source and artwork was released by Windward Studios under a non-commercial license around 2005/2006.|
|Falcon 4.0||1998||2000||Combat flight simulator||Proprietary (leaked code) / questionable BSD license (FreeFalcon community development branch)||Proprietary||MicroProse||A 2000 source code leak by a former developer allowed unofficial community development, including upgrades, improved graphics, and bug fixes. In 2013 the source code of one of the community development branches was released to a GitHub repository under a BSD license. As Atari currently owns the intellectual property and Graphsim has the exclusive right to publish, the legality of this source code is highly questionable.|
|Fish Fillets (now Fish Fillets NG)||1998||2002||Puzzle||GPL||GPL||Altar Games||Released commercially as Fish Fillets in 1998. Source released in 2002 under the GPL.|
|Flow||2006||2009||Life simulation||? (For educational purposes)||Freeware||Thatgamecompany||Around 2009 the flash source code was made available for educational purposes by the developers.|
|Fort Apocalypse||1982||2015||action||CC BY-NC-ND 2.5||CC BY-NC-ND 2.5 (Freeware)||Steve Hales / Synapse Software||In 2007 the Atari 8-bit game was relicensed to a CC BY-NC-ND 2.5 by Steve Hales and released on IgorLabs. On April 23, 2015, Steve Hales released the assembler source code to Fort Apocalypse on GitHub, also under CC BY-NC-ND 2.5, for historical reasons.|
|Free Fall||1983||1999||Beat 'em up||?||Freeware||Ian Bell/Acornsoft||In 1999, developer Ian Bell released the video game's BBC Micro assembly source code on his website. Semi-serious he considers it the first ever Beat 'em up video game.|
|FreeSpace 2 (now FreeSpace 2 Source Code Project)||1999||2002||Space Sim||Non-commercial/Proprietary||Proprietary||Volition, Inc.||Game source released by Volition, Inc. on April 25, 2002.|
|Frogatto & Friends||2010||2010||platformer||Zlib license / CC-BY 3.0||Proprietary||Lost Pixel||The game was developed open-source on github with an own open-source game engine by several The Battle for Wesnoth developers and released in July 2010 for several platforms. The game was for purchase on the MacOS' app store, iPhone App Store and BlackBerry App World as the game assets were kept proprietary.|
|Gates of Skeldal||1998||2008||Dungeon crawler role-playing video game||GPL 3||Freeware||Napoleon Games||On 19 November 2007 the game was made freeware by the Czech developer, in 2008 the source code was released under GPLv3 on a sourceforge repository. Later it was translated by fans to English and ported to linux.|
|Gish||2004||2010||Action||GPL||Proprietary||Cryptic Sea||Source opened with Humble Indie Bundle by Wolfire Games.|
|Glider PRO||1994||2016||Flight simulator||GPLv2||GPLv2||John Calhoun||On 27 Jan 2016, the source code, graphics, and sound data for Glider PRO were released on GitHub with the source code being licensed under the GNU General Public License v2.|
|Glitch||2009||2013||MMO||client and other parts under CC0||CC0||Tinyspeck||In 2013, one year after the MMO was shut down, most of the artwork and parts of the code were released under the CC0 license.|
|Glypha III||1990s||2016||Arcade||MIT||MIT||John Calhoun||On 27 Jan 2016, the source code, graphics, and sound data for Glypha III were released on GitHub with the source code being licensed under the MIT license. Updated ports for MacOs and iPhone were created afterward.|
|Gothic 3||2006||2007||RPG||Proprietary||Proprietary||JoWood||Source code was opened by JoWood for the members of "Community patch project" from the game community in 2007.|
|Gravity Force 2||1994||2008||Multidirectional shooter||no license given||no license given||Jens Andersson & Jan Kronqvist||On September 21, 2008 the developers of the Amiga shareware title Gravity Force 2 released the source code for "nostalgic interest" without specified license.|
|H-Craft Championship||2007||2015||science fiction racing game||zlib license||Freeware||Irrgheist||H-Craft Championship was developed by the independent game studio Irrgheist and released by Manifesto Games/Akella in 2007. In 2014, the developers released the game as freeware and the source code under the zlib license in February 2015.|
|Habitat||1985||2016||early MMORPG||MIT||MIT||Randy Farmer and Chip Morningstar/Lucasfilm Games||The The Museum of Art and Digital Entertainment received the game's source code from its original developers, and restored the code in a Hackathon. In July 2016, the source code was uploaded to GitHub under MIT license.|
|Hack 'n' Slash||2014||2014||Zelda-like puzzle game||?||Proprietary||Double Fine||With the 1.0 release on September 9, 2014 also the source code of the game was released by Double Fine.|
|Hacker Evolution: Source code||2007||2015||Hacker game||?||Proprietary||Exosyphen||Released on May 11, 2015 for $49.95 by the indie game developer.|
|Handmade Hero||2014||2014||?||proprietary||Proprietary||Casey Muratori||Senior video game developer Casey Muratori started November 2014 a project to program a commercial C based game from the scratch and documenting the development in a series of videostreams; planned are 600 episodes, one per day. The game's recent prototypes and source code are made available for 15$. The final game will be DRM-free, cross-platform and the source code will be given into public domain two years after its release.|
|Heretic||1994||1999||FPS||GPLv2||Proprietary||Raven Software||Game source released on January 11, 1999, relicensed to GPL on September 4, 2008.|
|Hexen: Beyond Heretic||1995||1999||FPS||GPLv2||Proprietary||Raven Software||Game source released on January 11, 1999, relicensed to GPL on September 4, 2008.|
|Hexen II||1997||2000||FPS||GPL||Proprietary||Raven Software||Game source released on November 10, 2000.|
|Homeworld||1999||2003||Space Real-time strategy||Non-commercial license||Proprietary||Relic Entertainment||Game source released 2003. The source code became the base of several source ports to alternative platforms, like Mac, Linux, Pandora, Maemo/N900, or Android using the Simple DirectMedia Layer (SDL) cross-platform multimedia library. As the source code's license requirements limits further development significantly the game's community aims for a re-licensing with the new IP holder Gearbox. In September 2013 Gearbox responded positively to the idea for a re-licensing of the already published source code, noting their efforts in supporting the modding community.|
|HoverRace||1996||2008||Racing||originally time limited license / later non-commercial GrokkSoft HoverRace SourceCode License.||GrokkSoft||Was first published under a time-limited license. On 2008 re-newed with an infinite duration license.|
|Hovertank 3D||1991||2014||FPS||GNU General Public License||Proprietary||Flat Rock Software/id Software||First 3D game by id Software and John D. Carmack.|
|Hundreds||2010||2010||Puzzle game||?||?||Greg Wohlwend/Semi Secret||Greg Wohlwend chose to open source his code in 2010, partly with the intent to spur "non-coders" to try coding, as he had. Programmer Eric Johnson of Semi Secret found the open source version and ported the game to iPad in a weekend before notifying Wohlwend, which was later released commercially in an updated version.|
|In Pursuit of Greed||1996||2014||FPS||non-commercial use, "for educational and personal use only"||Freeware (non-commercial)||Mind Shear Software||Based on Softdisk Publishing's "Raven engine" which powered also ShadowCaster. The game was released (including the engine) later by the developer as non-commercial freeware in 2014.|
|Infinity||2002||2016||RPG||Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License||Freeware (non-commercial)||Affinix Software||Developed in 2002 as commercial Game Boy Color title (~90% finished) the game was never published. Finally released as non-commercial freeware with source code in August 2016.|
|Inside a Star-Filled Sky||2011||2011||Top-down shooter||public domain software||public domain||Jason Rohrer||Inside a Star-filled Sky, for purchase for $12, was put by developer Jason Rohrer into public domain, like many other of his games.|
|Iron Seed||1994||2013||Space trading and combat simulator||GPL||Freeware (audiotracks proprietary?)||Channel 7||Released as freeware by the authors to promote the development of Iron Seed 2 in the 2000s. Source opened under the GPL by the developers in 2013.|
|Jagged Alliance 2 Wildfire (now JA2-Stracciatella)||2004||2004||Tactical role-playing game||Own license||Proprietary||iDeal Games||Source code was bundled and released with JA2: Wildfire 2004. The unfinished business source code became available too.|
|Ken's Labyrinth||1993||2001||FPS||Non-commercial license||Freeware||Ken Silverman||Ken's Labyrinth was released as freeware on November 16, 1999. The source code under a non-commercial license followed on July 1, 2001. A port to modern operating systems such as Windows and Linux using Simple DirectMedia Layer called LAB3D/SDL was created by Jan Lönnberg and released in 2002. A version of the port which includes new higher resolution textures was also created by Jared Stafford.|
|Kiloblaster||1992||2008||Arcade||Own license||Freeware (with additional restriction)||Epic MegaGames||Allen Pilgrim declared the registered version freeware and released also the source code on August 4, 2008.|
|Kumquat & Cantaloupe||1996||2012||Maze||undefined||Freeware||Dave Schofield||The Amiga games Kumquat & Cantaloupe, originally released as shareware titles, were re-released as freeware with source code included by the author in November 2012.|
|Kroz||1987||2009||Maze||GPL||GPL||Apogee Software||Game source released on March 20, 2009.|
|Lemmings||1991||2010||Puzzle game||?||?||Brutal Deluxe||Brutal Deluxe released the source code of the Apple IIgs port of Lemmings (and a dozen other ports).|
|Lemonade Stand||1973||1979||Business simulation game||Public domain software (?)||Freeware||Bob Jamison, Charlie Kellner/MECC||The Applesoft BASIC source code was available since 1979. The game was later ported to modern REALbasic and released as free and open-source software for many platforms like Windows and MacOS.|
|Lemma||2014||2014||Voxel FPS open world parcour||MIT||Commercial||Evan Todd||Despite an unsuccessful crowdfunding campaign in 2014, Lemma was released commercially by the developer DRM-free and also on Steam. The source code is openly developed and available on GitHub under a MIT license.|
|Lugaru||2005||2010||Action-adventure game||GPLv2||Proprietary||Wolfire Games||Open sourced with the first Humble Indie Bundle by Wolfire Games. Later an open source HD version followed.|
|Magic Land Island (now Pocket Island)||2011||2012||Casual game||MIT license||CC BY-NC-SA||Wooga||Magic Land Island was launched during the GDC Europe in August 2011. In June 2012 the HTML5 game was open sourced under the name Pocket Island on GitHub under MIT license and with the assets under Creative Commons license CC BY-NC-SA.|
|Magus||1995||2014||Rogue-like||?||Freeware||Ronny Wester||Around 2014 archived on github from other now offline sources. A SDL port is in progress.|
|Maelstrom||1992||1995/2010||Shoot 'em up||GPL||CC-BY||Ambrosia Software||Asteroids clone. 1995 source released under GPL. In 2010 Andrew Welch and Ian Gilman released the game's contents under a Creative Commons license.|
|Marathon 2: Durandal (now Aleph One)||1995||2000||FPS||GPL||Proprietary||Bungie Software||Released by Bungie on January 17, 2000.|
|MechCommander 2||2001||2006||Real-time tactics||Shared Source Limited Permissive License||Proprietary||FASA Interactive/Microsoft||Source opened under a Shared Source license by Microsoft in August 2006.|
|MegaBall||1991||2012||Breakout clone||Apache license v2||Apache license v2||Mackey Software/Ed Mackey||The Amiga game MegaBall was programmed by Mackey Software in 1991-1993. Inspired by Taito's Arkanoid it has several features more. The original author released in 2012 the source code of MegaBall under the Apache license v2.|
|Meridian 59||1995||2012||MMORPG||GPLv2 (excluding compression and audio libraries)||Freeware||Archetype Interactive||As of February 2010 Meridian 59 has been turned over to the original technical developers, Andrew and Chris Kirmse. On September 15, 2012 they released the game to the public as Freeware and most of the source code under the GPLv2 license.|
|Miner Wars 2081||2012||2013||6DOF Space Shooter game||own proprietary license||Proprietary||Keen Software House||6DOF action-survival space-shooter simulation-game set in the year 2081. Full game and engine source code released under a restrictive license.|
|Monster RPG 2||2010||2012||JRPG||zlib license||zlib license||Nooskewl||After a successful Indiegogo campaign, released by Nooskewl under a Public domain like license ("Give it Your Own License") on November 11, 2012. Later changed to zlib license, and the content sold again to be able to pay the server bills.|
|MiG Alley||1999||2001||Flight simulation||own license||Proprietary||Rowan Software/Empire Interactive||Source opened by Rowan Software/Empire Interactive in 2001.|
|Mr. Do! (for Gameboy)||1992||2007||Arcade||source opened without defined license||without defined license||Universal Entertainment Corporation||Source opened of the game boy version by developer Wesley Knackers in 2007 on his website.|
|Myth (series)||1998||2001||Real-time tactics||source opened without defined license||Proprietary||Take 2 Interactive/MumboJumbo||Source opened by Take 2 Interactive/MumboJumbo to the game community in 2001.|
|Myst Online: Uru Live||2007||2010||MMORPG||GPLv3||Proprietary||Cyan Worlds||"Myst Online: Uru Live" struggled to attract subscribers and was canceled after its first year. Cyan release the game as an open source game in 2010.|
|Natural Selection||2002||2014||FPS||GPLv2 (most code) / custom (external libraries)||Proprietary||Unknown Worlds Entertainment||In January 2014 Unknown Worlds released the source code for download on GitHub.|
|Nanosaur||1998||2003||FPS||Own restrictive license||Proprietary||Pangea Software||Around 2003 the Nanosaur source code was made available by the developer under a restrictive license.|
|NoGravity||1996||2005||Arcade||GPL||Proprietary||realtech VR||Source code released by realtech VR on February 16, 2005.|
|Nothing to Hide||2013||2013||Stealth game||CC0||CC0||Nicky Case||The crowdfunded surveillance/privacy themed video game prototype by indie game developer Nick Liow was crowdfunded and opened under CC0 on GitHub between 2013 to 2015.|
|No One Lives Forever 2: A Spy in H.A.R.M.'s Way||2002||2011||FPS||GPLv2||Proprietary||Monolith Productions||Source code released by Monolith Productions/Sierra Entertainment as part of a modding toolkit|
|Pararena 2||1992||2016||Action sport game||MIT||MIT||John Calhoun||On 27 Jan 2016, the source code was released on GitHub licensed under the MIT license.|
|Penumbra: Overture||2007||2009||Survival horror with FPS aspects||GPL||Proprietary||Frictional Games||Developed by Swedish developer Frictional Games, the game blends the genres of survival horror, first-person shooter, and adventure. Open sourced with Humble Indie Bundle.|
|Pinball Construction Set||1983||2013||pinball video game||MIT license||MIT license||Bill Budge, Electronic Arts||In 2013, Budge released the source code to the Atari 800 and Apple II version of Pinball Construction Set to the public on GitHub under the MIT license.|
|Pirate Adventure||1978||1980||adventure game||?||?||Scott Adams (game designer)||The source code for Pirate Adventure was printed in the December 1980 issue of BYTE, with an addendum in April 1981. This enabled others to discover how the engine worked and to create their own adventures using this or a similar design.|
|Pitman||1985||1985||Puzzle game||?||?||Yutaka Isokawa||Originally created in 1985 on a MZ-700 home computer by Yutaka Isokawa. The BASIC listing was published in the August 1985 issue of the magazine "Oh!MZ Publications". In 1990 the game was commercially converted for the Game Boy. In 2011 the game community restored an faithful as possible version from the available variants.|
|Pixel Dungeon||2014||2014||roguelike||GPLv3||GPLv3||watabou||While sold on Steam for $4.99 it was released in July 2014 on GitHub under GPLv3 including the assets.|
|Postal||1997||2016||Top-down shooter||GPLv2||proprietary||Running With Scissors||In 2015 the Running with scissors developers announced that they will release the source code of the game "if someone promises to port it to the Dreamcast". In June 2016 the developers gave the source code to a community developer who ported the game to Linux for the OpenPandora handheld. On December 28, 2016, the source code was released on BitBucket under the GPLv2.|
|Preppie!||1982||2016||action game||?||?||Russ Wetmore/Star Systems Software||In January 2016 Russ Wetmore released the source code of his Atari 8-bit family games Preppie!, Preppie II and Sea Dragon to the public on the Internet Archive.|
|Prince of Persia||1989||2012||Cinematic platformer||Proprietary||Proprietary||Jordan Mechner||Apple II source code was long-thought-lost, but was found again and released in 2012. A port of the assembly source code to C and SDL as backend was made by a community programmer.|
|Project: Starfighter||2001||2008||Shoot 'em up||GPL||Proprietary||Parallel Realities|
|Quake||1996||1999||FPS||GPL||Proprietary||Id Software||Game source released on December 21, 1999.|
|Quake II||1997||2001||FPS||GPL||Proprietary||Id Software||Game source released on December 22, 2001.|
|Quake III Arena||1999||2005||FPS||GPL||Proprietary||Id Software||Game source released on August 19, 2005.|
|Quadrilateral Cowboy||2016||2016||Puzzle video game||GPL||Proprietary||Blendo Games||Game source released on August 8, 2016 as it is based on the id-tech 4 engine.|
|Return to Castle Wolfenstein||2001||2010||FPS||GPL||Proprietary||Id software||The source code for Return to Castle Wolfenstein and Enemy Territory was released under the GNU General Public License (GPL) on August 12, 2010.|
|Revenge of the Titans||2010||2011||Tower Defense, RTS||Custom all-permissive||Proprietary||Puppy Games||Java based game. Source code was released by Puppy Games with the success of the second Humble Indie Bundle.|
|Rise of the Triad||1994||2002||FPS||GPL||Proprietary||Apogee Software/3D Realms||Game source released on December 20, 2002.|
|Roboforge||2001||2008||Multiplayer Strategy game||"RoboForge, Personal, Non-Commercial Use End User License"||Freeware||Liquid Edge||Announced the game in July, 2000 by Liquid Edge the game was released on May 23, 2001. From July 2008 RoboForge became an Open Source project with the source code for the Java-based client and server under a non-commercial license and as freeware. The game's community continues development.|
|Rocky Racers||2002||2004||Racing game||Non-Commercial license||Freeware||Positech Games||Released around 2002 by Positech Games, the game's C++ source code was released in July 2004 to the public for free.|
|Rowan's Battle of Britain||2000||2001||Flight simulation||Empire Interactive License||Proprietary||Rowan Software/Empire Interactive||Source opened by Rowan Software/Empire Interactive in 2001.|
|RuneSword II||2001||2004||Turn-based strategy||Public domain software||Public Domain||CrossCut Games||In 2004 CrossCut Games released the game into the public domain on SourceForge. Since then there is continuous development by the community on the game.|
|Ryzom||2004||2010||MMORPG||AGPL||CC||Nevrax||In response to the folding of Nevrax, the Free Ryzom Campaign was launched in order to gather enough funds from donations ("Crowdfunding") from the community to purchase Ryzom and release the game as free software. The campaign was almost successful with €172,988 of the required €200,000 gathered. On May 6, 2010, Winch Gate announced the full release of source code and artwork, and a partnership with the Free Software Foundation.|
|Santa Paravia en Fiumaccio||1978||1978||turn-based strategy||public domain||public domain||George Blank||The game by George Blank first appeared in the December 1978 issue of SoftSide magazine as BASIC listing. It was published for sale on tape cassette as a computer game by Instant Software for the Radio Shack TRS-80, the Apple II, Texas Instruments TI-99/4A, and the Commodore PET. It has been translated into many programming languages, such as ANSI C, and has been ported to the Palm Pilot.|
|Savage: The Battle for Newerth||2003||2007||online Real-time strategy, FPS||no license/proprietary||Freeware||S2 Games||The game was turned freeware by S2 Games on September 1, 2006. In 2007 the source code became available to the game community, who now continues development.|
|Serious Sam (Serious Engine)||2001||2016||FPS||GPLv2+||Proprietary||Croteam||In March 2016, Croteam released Serious Engine v1.10 as free and open source software on GitHub under the GNU General Public License.|
|Seven Kingdoms||1996||2008||RTS||GPL||GPL and Proprietary*||Enlight||Source code released by Enlight in November, 2008. *Music is proprietary|
|Seven Kingdoms II||1999||2009||RTS||GPL||Proprietary||Enlight||Source code released in August, 2009.|
|Shadowgrounds||2005||2011||Shoot 'em up||own non-commercial license||Proprietary||Frozenbyte||Game source released with a Humble Indie Bundle by Frozenbyte on April 22, 2011.|
|Shadow Warrior||1997||2005||FPS||GPL||Proprietary||3D Realms||Game source released on April 1, 2005.|
|Siege of Avalon||2000||2003||RPG||LGPL||Proprietary||Digital Tome||Source code released June 23, 2003.|
|SimCity (Micropolis)||1989 (as SimCity)||2008 (as Micropolis)||City-building game||GPLv3||GPLv3||Maxis (Will Wright/Don Hopkins)||Source code released by Don Hopkins under GPL in 2008. For trademark reasons released under the original working title Micropolis, also known as OLPC SimCity.|
|Softporn Adventure||1981||?||Text adventure||public domain?||Freeware||On-Line Systems||A comedic, adult-oriented text adventure game produced for the Apple II in 1981. The game was created by Charles Benton and released by On-Line Systems and became later the base for Leisure Suit Larry 1. Source code became later available. The PC version was also released later as freeware by Al Lowe.|
|Sopwith||1984||2000||Shoot 'em up||GPL||GPL||David L. Clark||The C and x86 assembly source code to Sopwith was released in 2000, at first under a non-commercial use license, but later under the GNU GPL at the request of fans.|
|Soul Rider||2000||2003||Snow board simulation/sport game||GPL||Proprietary||Slingshot Game Technology||On 20 Jan 2003 Soul Rider's game engine source code was released to allow ports to alternative OSes.|
|Spacebase DF-9||2013||2015||Space simulator||CPAL||?||Double Fine||After Double Fine ended the support of the controversy ridden and incomplete game on end of 2014, fans have been working to continue the game's development with the availability of the source code in May 2015 under the CPAL open-source license. First patch became available in October 2015.|
|Space Engineers||2013||2015||space sandbox game||proprietary||commercial||Keen Software House||On May 14, 2015 the development studio made the source code freely available to the game's community for easier modding on GitHub under a proprietary license (non-open source license).|
|Spear of Destiny||1992||1995||FPS||ID SOFTWARE LICENSE||Proprietary||id Software||The source code of Wolfenstein 3D, which also covered Spear of Destiny, was released on July 21, 1995.|
|Speed Haste||1995||2012||racing video game||public domain like license||proprietary||Javier Arevalo Baeza||In 2012 the game's developer Javier Arevalo Baeza released the Borland C source code (minus some commercial library part) for "you can do whatever you want with this code" on GitHub.|
|Star Control II (now The Ur-Quan Masters)||1992||2002||Action RPG||GPL||Cc-by-nc-sa||Toys for Bob (Fred Ford / Paul Reiche III)||Source code of the 3DO version GPL-released in 2002.|
|Star Raiders||1979||2015||space combat simulator||?||?||Atari||The commented assembly source code scan of Star Raider became available in October 2015 in the Internet Archive as scan. The community typed in the source code double checked in a github project. Shortly before a reverse engineering project was finished, too.|
|Star Trek: Elite Force II||2002||2003||Action RPG||non-commercial own license (only serverside part)||proprietary||Ritual Entertainment||In November 2003 Ritual Entertainment released the source code of their server-side code base for multiplayer gaming under a non-commercial license.|
|Star Wars Jedi Knight II: Jedi Outcast||2002||2013||First/Third person shooter||GPLv2||Proprietary||Raven Software||Release of the source code by Raven Software and Activision coincided with the closing of LucasArts by Disney.|
|Star Wars Jedi Knight: Jedi Academy||2003||2013||First/Third person shooter||GPLv2||Proprietary||Raven Software||Release of the source code by Raven Software and Activision coincided with the closing of LucasArts by Disney.|
|Starshatter: The Gathering Storm||2004||2011||Space combat simulator||New BSD License||Freeware||Destroyer Studios/Matrix Games||Source code released by Destroyer Studios/Matrix Games on December 14, 2011.|
|Strange Adventures in Infinite Space||2002||2005/2009||Space Roguelike||GPL||Freeware||Digital Eel||Source was release under GPL by Digital Eel in 2005. Content became freeware 2009.|
|Strife: Veteran Edition (Strife remaster)||2014||2014||FPS||GPLv3||Proprietary||Samuel Villarreal/Night Dive Studios||In December 2014, Night Dive Studios coordinated the re-release of the 1996 first-person shooter role playing hybrid game Strife as Strife: Veteran Edition, after acquiring rights to the game. Because the game's source code had been lost, a derivative of the Chocolate Doom subproject Chocolate Strife was used as the game's engine, with its original programmers being contracted to do additional coding for the re-release. The source code of Strife: Veteran Edition has been made available under GPLv3 on GitHub by Samuel Villarreal and Night Dive on December 12, 2014. While this was the first source code opened for a Night Dive Studio's game, it was announced more will follow, for instance for System Shock 1.|
|Stellar Frontier||1997||2008||Space simulation||STARDOCK SHARED SOURCE STELLAR FRONTIER LICENSE (non-commercial license)||STARDOCK SHARED SOURCE STELLAR FRONTIER LICENSE (non-commercial license)||Stardock||Stellar Frontier was developed by Doug Hendrix in 1995 and was later licensed and published by Stardock. On August 4, 2006, Stardock Systems closed the official master server. On November 18, 2008, the game source code was released under an own non-commercial license. As result, the game's community took over the support of the game and improved the game, fixed the bugs and security holes with self-made patches.|
|Super Lemon Factory||2012||2012||Text adventure||proprietary||proprietary||Initialsgames||Based on the Cannabalt engine for iOS, and inspired by it to release the source code.|
|Supernova||1987||2009||Text adventure||GPL||GPL||Apogee Software||Game source released on March 20, 2009.|
|Taxman||1981||201?||pacman clone||?||?||H.A.L. Labs / Brian Fitzgerald||Apple II pacman clone from 1981. In August 2015 Rebecca Heineman announced that original developer Brian Fitzgerald allowed to release the source code. Github repository still empty as of February 2017.|
|Team 47: GoMan||1997||1998||Mech game||public domain software||public domain||47-TEK||Released artwork and source code to public in May 1998.|
|Telengard||1982||1982||Dungeon crawler, role-playing, roguelike||?||?||Avalon Hill / Daniel Lawrence||As the game's BASIC source code ("DSKTEL.BAS") was available early on, ports and remaster exist therefore by the community.|
|Terminal Velocity||1995||2015||flight game||?||?||Mark Randel / Terminal Reality||Became available under a NDA in June 2015. Work on an updated version for modern system started immediately.|
|The Castle Doctrine||2014||2014||MMO||Public Domain||Public Domain||Jason Rohrer||The Castle Doctrine is developed by Jason Rohrer in a public Sourceforge repository and is like most of his creative works into the public domain. The The Castle Doctrine was developed as an early access game and is now sold on Steam for $14.99.|
|The Clue!||1994||2000||role-playing adventure game||own license||own license / Freeware||neo Software Produktions GmbH||In 2000 the source code was released to the public. The game is since then ported to modern platforms via SDL and receives still updates by the community (2015).|
|The Prisoner||1980||1980||adventure game||?||?||Edu-Ware / David Mullich||Developed in BASIC for the Apple II the source code was available with the release. Source code is hosted on github.|
|The Oregon Trail||1971||1971/1978||Role-playing video game||Public domain (?)||Public domain (?)||Don Rawitsch/MECC||Rawitsch published the source code of The Oregon Trail, written in BASIC 3.1 for the CDC Cyber 70/73-26, in Creative Computing's May–June 1978 issue. In 2011 the 1975 and 1978 BASIC source code versions of the game were reconstructed.|
|The Wizard's Castle||1980||2004||role-playing adventure game||?||?||Joseph R. Power||The BASIC source code of the 1980 developed game was published by the developer in the July/August 1980 issue of Recreational Computing. Ports to other systems followed afterwards.|
|The Pit Puzzle||1997||2011||Puzzle game||Apache 2.0 License||Freeware||Abe Pralle / Plasmaworks||The DOS game source code was released around 2011 by the author Abe Pralle under Apache 2.0 License on github.|
|Tread Marks||2000||2017||Tank Combat/Racing||GPLv3||Freeware||Longbow Digital Arts / Seumas McNally||Won in 2000 the Seumas McNally Grand Prize. In January 20, 2017 the source code was released as open source on github.com and the game itself as freeware.|
|Treasures of a Slaver's Kingdom||2007||2010||Z-machine Text adventure game||Freeware||Freeware||Cumberland Games & Diversions||S. John Ross released the commercial Treasures of a Slaver's Kingdom, which won the XYZZY Award 2007 for the best NPC, in 2010 with Z-machine source code as freeware. More source code of text adventure from the 1970s and 1980s are available at the archive.|
|To Heart 2||2004||2006||Visual novel||GPL||Proprietary||Aquaplus||Its source code was released by Aquaplus under the GNU General Public License on December 22, 2005 along with the source code for Arurū to Asobo!!, Tears to Tiara, and Kusari. This decision was made due to the inclusion of Xvid derived code; Xvid being distributed under the same license. The source code for all four games is distributed upon request in CD-R format. A copy is hosted on github.|
|Tornado||1993||2017||combat flight simulator||?||Proprietary||Digital Integration / Interplay Entertainment||In March 2016 in the Tornado's community forum, rumors surfaced that Interplay Entertainment was working on a re-release of the game for digital distribution, based on the original source code. The assembly source code finally surfaced on January 2017 on github.com.|
|Tribes 2||2001||2012||FPS||Torque engine under MIT, rest is proprietary||Freeware||Dynamix||Many commercial titles were developed using the Torque engine. GarageGames released Torque 3D under the MIT License on September 20, 2012. The Tribes 2 source code beside the Torque engine is not available.|
|Triplane Turmoil||1996||2009||side-scrolling dogfighting flying game||GPLv3||GPLv3||Dodekaedron Software||In 1996 Triplane Turmoil was originally released as shareware DOS game. In 2009 Dodekaedron Software Creations Oy placed Triplane Turmoil's source code, documentation, images and sounds under the GPLv3, hosted on Sourceforge. The community continued the support and ported the game to other platforms (Linux, Windows) via SDL.|
|Tyrian (now OpenTyrian)||1995||2007||Scrolling shooter||GPLv2||Freeware/CC-BY 3.0 US||World Tree Games Productions / Epic MegaGames (Jason Emery/Daniel Cook)||The OpenTyrian team ported the closed-source Pascal code of Tyrian to C with permission of Jason Emery in February 2007. The graphic artist Daniel Cook released the artwork shortly after.|
|Unreal||1998||2008||FPS||source opened without defined license||Proprietary||Epic MegaGames||Access to source-code granted by Epic MegaGames for the game community around 2008. In 2015 Tim Sweeney announced that he hope to be able to open source one day the engine to the public.|
|Uplink||2001||2003||Hacking simulation||Proprietary||Proprietary||Introversion Software||Mid-2003 Introversion Software started selling the source code for $45. Usage beside modding and fixing of the game are not permitted by the license. Source code of the games Darwinia + Multiwinia and DEFCON was later sold too.|
|Ultima: Escape from Mt. Drash||1983||2003||Role-playing video game||Proprietary||Proprietary||Keith Zabalaoui / Sierra On-Line||On 11 June 2003, the game was ported to PC (under GPLv2 license) by Kasper Fauerby based on the original BASIC source code and some smaller binary reverse engineered parts.|
|Vangers||1998||2016||racing and role-playing genre||GPLv3||Commercial||K-D Lab||In March 2016, Vangers source code was released under GPLv3 license. Data was not freed though, so one still needs data files from Steam or GOG.com release in order to run the game.|
|Vox||2013||2015||open world simulation||GPLv3||commercial||AlwaysGeeky Games||Vox started life as an entry into the Ludum Dare competition. The game was successfully Steam Greenlighted on November 12, 2013. Around end of 2015 the source code of Vox was made available as open-source software under the GPLv3 on github.|
|Voxelquest||2014||2016||open world simulation||MIT||MIT||Gavan Woolery||After a successful crowdfunding project on Kickstarter to develop an open-world simulation game in 2014, Gavan Woolery developed several iterations of the game's engine. After running out of funding for further development, he open-sourced with support of the backers the game's engine on github.com under MIT license in August 2016.|
|Wander||1974||2015||Text adventure||public domain (?)||public domain (?)||Peter Langston||In April 2015 the lost thought source code of Wander, one of the earliest mainframe text adventures, could be acquired from the original author.|
|Warlords Battlecry III||2004||2006||RTS||Own proprietary license||Proprietary||Infinite Interactive/Enlight Software||On 24 May 2006, the Warlords Battlecry III source code became available to the public. Members of the community (who signed a NDA) have been entitled distributors, which have the legal permissions to allocate copies of the Warlords Battlecry III source code. The source code release resulted in the development of several community-made fan patches and mods.|
|War Worlds||2013||2014||RTS||Own permissive license||Own permissive license||Codeka / Dean Harding||The mobile strategy game was originally released commercially, and later released to the public to allow the community to continue the support of the game. With help of the community the game's main developer has continued the support since then.|
|Warfare Incorporated (now Hostile Takeover)||2003||2014||RTS||BSD license||BSD license||Spiffcode||In July 2014 the game's source code and content got open sourced with the BSD license under the name "Hostile takeover" on GitHub. As result the game was ported by the game's community to alternative platforms like the Pandora handheld.|
|Warzone 2100||1999||2004/2008||RTS||GPLv2||GPLv2, CC||Pumpkin Studios/Eidos Interactive||3D real-time strategy game with a unit design system. First source part was released by Pumpkin Studios/Eidos Interactive in 2004 and the rest was released in 2008.|
|Witchaven series||1995||2006||FPS||non-given||Proprietary||Capstone Software||Around 2006 Les Bird, a programmer from the 1996 folded game development company Capstone Software, released the source code of the abandoned games Witchaven, Witchaven II, William Shatner's TekWar and Corridor 7: Alien Invasion.|
|Wolfenstein 3D||1992||1995||FPS||ID SOFTWARE LICENSE||Proprietary||id Software||The source code of Wolfenstein 3D, which also covered Spear of Destiny, was released on July 21, 1995.|
|Wolfenstein: Enemy Territory||2003||2010||FPS||GPLv3||Proprietary||Splash Damage/id Software||Game source released on August 12, 2010.|
|World Train Royale||2009||2011||Tycoon game||Freeware||Versus Software||Sold around 2009 for 10 dollars, the game source code was released on 26 June 2011 on sourceforge.|
|Word Whiz||1988||2009||Educational game||GPL||GPL||Apogee Software||Game source released on March 20, 2009.|
|Xargon||1993||2008||Platformer||own license||Freeware (with additional restrictions)||Epic MegaGames||Game source released in 2008 by the programmer Allen Pilgrim.|
|Xenonauts||2014||2015||Turn-based tactics||?||Proprietary||Goldhawk Interactive||Shortly after the release of the stable version Goldhawk Interactive allowed selected members of the community to access the source code. This resulted in the community edition of the game (Xenonauts:Community Edition, X:CE), which continues development of an independent branch of the game, adding new features and bugfixes.|
|Zork (also known as Dungeon or Dungeon Adventure)||1977||1978||Text adventure||Public domain software||Public domain||Robert M. Supnik/Infocom||Public domain software ports with source code based on the first "Dungeon" version of Zork, are available in various repositories. Also, Infocom allowed the distribution of the early Fortran version.|
Games with available source code
The table below with available source code resulted not from correct releases of companies or IP holders but from unclear release situations, like lost & found and leaks of unclear legality (e.g. by an individual developer on end-of-product-life).
|Title||Original release||Source code found or leaked||Genre||Original developer||Additional information|
|Asteroids||1979||1996||Arcade||Atari||Source code of Asteroids in the Atari 7800 version was released in physical form by Atari Sunnyvale on their closure 1996. Together with Ms. Pac-Man, Dig Dug, Robotron: 2084 and eight further games reconstructed by the Atari-Museum and published later. Ports for modern FPGAs were made later.|
|Art of Fighting||1992||2014||Fighting game||SNK||Found in a PC9821 (neogeo dev machine) the full source code of the Art of Fighting ASM 68k source code in 2014.|
|B.O.B.||1993||2008||Side-scrolling game||Electronic Arts||On September 12, 2008 the source code of the SNES version became available as it was found on an eBay-bought hard drive.|
|Captain Comic||1988||2012||Platformer||Michael Denio||In September 2012 the source code of the NES version was offered on ebay for $439.|
|Chicken Run||2000||2011||Stealth game||Blitz Games||In May 2011 the Sega Dreamcast source code became available, found by a collector on a Dreamcast Dev Kit's harddrive.|
|Dark Engine (Thief, Thief II, System Shock 2)||1993||2009/2010||Stealth game||Looking Glass Studios||In 2009, a complete copy of the Dark Engine source code was discovered in the possession of an ex-Looking Glass Studios employee who was at the time continuing his work for Eidos Interactive. In late April 2010, a user on the Dreamcast Talk forum disassembled the contents of a Dreamcast development kit he had purchased. Later, significant updates for the Dark Engine-based games were published.|
|Dark Reign 2||2000||2011||RTS||Pandemic Studios||Released by a former developer of Pandemic Studios under LGPL to prevent that the game become unsupported Abandonware. Legal status unclear.|
|Donkey Kong||1981||2008||Platformer||Nintendo||In August 2008 the source code of Donkey Kong in Atari 800 6502 assembly was published at the AtariAge forum by Curt Vendel (the Atari Flashback designer), and was discussed there by the original developer, Landon Dyer.|
|Double Dragon II: The Revenge||1989||2013||Beat em up||Technōs Japan||In 2013 the Internet Archive put the undeleted assembly sources (DRGNSRC.LZH) of the DOS version for download.|
|Eve Online||2003||2011||Space strategy MMO||CCP Games||On 20 May 2011 someone released the EVE Online source code on a GitHub repository. After the source code was online four days, CCP issued a DMCA take-down request which was followed by GitHub.|
|Forsaken||1998||2007||6DOF shooter||Probe Entertainment||In 2007, nine years after the first release, the game itself and its source code were considered abandoned and became available to the public. The game's community took up the game and kept updating and porting the game via a GitHub repository under a GPL license.|
|Re-Volt||1999||200?||Racing game||Acclaim Studios London||Members of the fan-base have acquired the source code of the game around 2004, which was leaked from an anonymous developer who worked on the Xbox Live port. The game community works since then on fan patches and source ports to new platforms like Linux, MacOS and OpenPandora.|
|Ultimate Mortal Kombat 3||1994||2009||Beat'em up||Midway Games||The source code and artwork of the PSX version were recovered from floppies in 2009.|
|Mr Nutz 2||1994||2008||Platformer||Ocean Software||Amiga game, source code prototype associated with Peter Thierolf.|
|Killer7||2005||2016||Action-adventure game||Grasshopper Manufacture||Sources and assets for the GameCube game were found in October 2016 on an open webserver.|
|S.T.A.L.K.E.R.: Clear Sky (X-Ray Engine 1.5.10)||2008||2014||FPS||GSC Game World||In August 2014 S.T.A.L.K.E.R.: Clear Sky's X-Ray Engine 1.5.10 source code became available on GitHub under a non-open-source license. The successor's engine, X-ray 1.6.02, became available too.|
|Tony Hawk's Underground||2003||2016||Sports game||Neversoft||The game's C++ source code was leaked on February 2016 to github.|
|Turrican III||1994||2008||Run and gun||Factor 5||Amiga game, source code prototype associated with Peter Thierolf.|
|Turok: Dinosaur Hunter||1997||2017||First-person shooter||Iguana Entertainment / Acclaim Entertainment||In February 2017 the source code of the N64 version was sold on Ebay for $2551.99 on a SGI Silicon Graphics Indy development machine which came from the Acclaim Entertainment liquidation.|
|Trespasser||1998||200x||Action-adventure, FPS||DreamWorks Interactive||The fan community got the original source code into hand by unknown means and created modifications and unofficial patches with it, the latest DirectX 9 port from 2016 and the development ongoing.|
|Ultima 9||1999||2014||First person Role-playing video game||Origin Systems||In November 2014 the Ultima Codex Community was able to acquire the Ultima 9 source code from a former developer for offline archival to prevent permanent loss.|
|Wing commander series||1990||2011||Space simulator||Origin Systems||The long lost source code of Wing Commander I was given to the fan-community in August 2011 by a former developer for the purpose of long-time preservation. Later most other parts of the series followed.|
|Zork and other Infocom games||1977||2008||Adventure game||Infocom||In 2008 a back-up with the source code of all Infocom's video games appeared from an anonymous Infocom source and was archived by the Internet Archive's Jason Scott.|
Games with restored source code
Once games, or software in general, become an obsolete product for a company, the tools and source code required to re-create the game are often lost or even actively destroyed and deleted. On the closure of Atari in Sunnyvale, California in 1996, the original source code of several milestones of video game history (like Asteroids or Centipede) were thrown out as trash.
When much time and manual work is invested it is however still possible to recover or restore a source code variant which replicates the program's functions accurately from the binary program. Techniques used here are decompiling, disassembling and reverse engineering the binary executable. This approach typically does not result in the exact original source code but a diverging version as a binary program does not contain all information originally carried in the original source code. Comments and function names cannot be restored if the program was compiled without additional debug information. The here given in "bottom up" development methodology re-created source-code of games is able to replicate the behaviour of the original game exactly, unlike game engine recreations which are often made in top down methodology resulting in general game engines and not accurately representing the original game.
|Title||Original release||Source code reconstructed||Genre||Original developer||Additional information|
|Albion||1996||2011||Adventure game||Blue Byte||In 2011 via static recompilation from the original x86 binary executable a port for the ARM architecture of the Pandora handheld was created by fans. The community still updates this recompiled version and released also Windows and Linux builds in 2015, source code available on github under MIT.|
|Another World||1991||2011||Platform game||Delphine Software International||In 2011, Fabien Sanglard analysed Another World by reverse engineering and reconstructed, based on an earlier approach, a complete C++ source code variant of the internal virtual machine.|
|Bermuda Syndrome||1995||2007||Adventure game||Century Interactive||After the end of support for the game, Gregory Montoir reverse engineered in 2007 the game engine and wrote a substitute which allowed the porting of the game to modern platforms, like the OpenPandora handheld.|
|Boulder Dash||1984||2016||Arcade game||First Star Software||The C64 version was bit accurate reverse engineered by enthusiasts in month long work in 2016. The group reverse engineered several more games also from this period, like The Castles of Dr. Creep 3, Miner 2049er, Lode Runner, Manic Miner and Beach Head.|
|The Castles of Dr. Creep||1984||2010||Platform game||Edward R. Hobbs||Robert Crossfield worked on a faithful engine for the game since 2010.|
|Cannon Fodder||1993||2015||top-down shooter||Sensible Software||In December 2015, Robert Crossfield released version 1.0 of the reverse engineered DOS CD Cannon Fodder version, under the name "OpenFodder" on github under GPL.|
|Diablo II||2000||2015||Action RPG||Blizzard Entertainment||In 2015 an unofficial port for the ARM architecture based Pandora handheld became available by static recompilation and reverse engineering of the original x86 version.|
|Digger||1983||1998||Arcade||Windmill Software||Reverse engineered by Andrew Jenner in 1998, called Digger Remastered, released as GPL and ported for many platforms.|
|Dune II||1992||2009||Real-time strategy game||Westwood Studios||In 2009 a group started reverse engineering Dune II under the name OpenDUNE. The resulting code was released under GPLv2 and ported to other platforms like the Pandora.|
|Dungeon Keeper||1997||2005||realtime dungeon simulator||Bullfrog||Tomasz Lis works on reverse engineering (ongoing) a version called "KeeperFX", the resulting source code is released as GPLv3.|
|Dungeon Master||1989||2001||Dungeon crawler||FTL Games||In 2001 Dungeon Master (and its successor CSB) was released by Paul R. Stevens in a portable reverse engineered version called "CSBwin". CSBwin was reverse engineered from the game's Atari assembler code to a pure C version in months of work. In 2014 Christophe Fontanel released another reverse engineering project which tries to recreate all existing versions.|
|E.T. the Extra-Terrestrial||1982||2006||Arcade||Atari||In 2006 decompiled by Dennis Debro. Following that, several unofficial fixes for the game were released by a fan site.|
|Elite||1984||2003||Space trading game||Ian Bell, David Braben||Christian Pinder created Elite: The New Kind as faithful PC version by reverse-engineering platform-neutral C code from the original BBC Micro version of Elite. This version was withdrawn from the main distribution at David Braben's request in 2003. In September 2014, on Elite's 30th birthday, Ian Bell blessed Elite: The New Kind and re-released it for free on his website. Source code of the 1.0 version is available on a GitHub repository.|
|Escape from Colditz||1991||2009||Action-adventure game||Mike Halsall, John Law / Digital Magic Software.||Around 2009 some developers reconstructed from the Amiga version a C version under GPLv3. Ported then to many systems.|
|Exile||1988||2012||Action-adventure game||Peter Irvin||Around 2012 the assembly source code of the BBC Micro version was reconstructed and commented. Later author Peter Irvin blessed also the non-commercial redistribution of the Amiga version of the game.|
|Freeway||1981||19??||Arcade game||Activision||Decompiled and commented by Rebecca Heineman.|
|Football Manager||1982||2001||Sports game, Business simulation game||Kevin Toms||In 2001 Paul Robson developed an accurate remake of the original game by reverse engineering in C. The remake has since been ported to the GP2X and Google Android.|
|Frontier: Elite 2||1993||2006||Space trading game||Frontier Developments||Reverse engineered to C by Tom Morton until 2006.|
|Frontier: First Encounters (Elite III)||1995||2005||Space trading game||Frontier Developments||Frontier Developments announced in 2000 that FFE would be open-sourced under a GPL-similar license, but this never happened. In response, in October 2005 the game was reverse engineered by John Jordan and builds for modern operation systems were provided. Updated until December 1, 2009 and later continued by other programmers with builds like "FFE_D3D".|
|Half-Life||1999||2013||FPS||Valve Software||Around 2013 Valve released with the SDK some source code parts (server). The client and the Goldsrc engine parts were reverse engineered in context of the Xash3d project. Ports to other systems became available, for instance Android or the OpenPandora.|
|Heart of the Alien||1994||2004||Platformer||Interplay Entertainment||After Heart of the Alien became unsupported and unavailable, Gil Megidish took up 2004 the effort of extracting a source code variant from the binary game by reverse engineering to make the game available again on modern platforms. The extracted source code was made open-source and is hosted freely available on sourceforge.|
|Little Big Adventure||1994||2004||Action-adventure||Adeline Software International||Reverse engineered and placed on sourceforge (later GitHub) as "Twin-e" after getting an "OK" by Frederick Raynal.|
|Metroid||1986||?||Run and gun/Action-adventure game||Nintendo||The NES game was disassembled by the collaborative work of several developers over the course of years.|
|Minecraft||2009||2010||Sandbox game||Mojang||The Mod Coder Pack (MCP) offers scripts for de-obfuscation/decompilation of the Java-based version of Minecraft.|
|Out Run||1986||2012||Arcade racing||Sega||Since around 2009 a game enthusiast worked on decompiling source code of "Out Run". In 2012 a truthful engine, called "Canon Ball", was released on github. To run the game, the original game's assets are required. Ports to many systems followed, like OpenPandora.|
|Pokémon Red and Pokémon Blue||1996||2014||Role-playing video games||Nintendo||Reverse engineered assembly of the Game Boy Color game on github.com.|
|Pokémon Crystal||2001||2014||Role-playing video games||Nintendo||Reverse engineered assembly of the Game Boy Color game on github.com.|
|Pong||1972||2012||Arcade game||Atari||The available schematics ("source code") was reconstructed and adapted for modern and available electronic parts to a new PCB design in 2012.|
|RollerCoaster Tycoon 2||2002||2014||Business simulation game||Chris Sawyer||In April 2014 a project to reverse engineer Roller Coaster Tycoon 2 into platform independent C source code, was started under the name OpenRCT2 by Ted 'IntelOrca' John. Hosted as GPLv3 licensed open-source software on GitHub, it requires the original game's graphics and sound assets. As of November 2015, while the project has not fully reached the goal of substituting 100% of the binary's functionality, the port is playable and for many platforms builds are available.|
|PowerSlave||1996||2017||FPS||Lobotomy Software||On May 24, 2015, an unofficial remake based on the PlayStation version was released by Samuel "Kaiser" Villarreal for free. In May 2015 publisher Night Dive Studios acquired the game rights, Villarreal and Night Dive working on a digital distribution re-release. On January 2, 2017 Kaiser released the source code of his reverse engineered engine under the GPLv3 license on Github.|
|Snipes||1983||2016||early networked Multi player game maze game||SuperSet Software||In July 2016, a faithful port by reverse engineering the original game became available. Permission was granted by original authors Drew Major and Kyle Powell to make it public. The full C/C++ source code is available at GitHub.|
|Super Bomberman||1993||2015||Action, Maze||Hudson Soft||Reverse engineered assembly and build system of Super Bomberman by Lior Halphon on GitHub. Rebuilds several different versions of the game, and can restore some disabled debug features.|
|Super Mario Bros||1985||2012||Platformer||Nintendo||Commented disassembly of SMB on GitHub.|
|Space Ace||1984||2015||Interactive movie||Advanced Microcomputer Systems||In July 2015 Rebecca Heineman released a reverse engineered Apple IIGS source code version of Space Ace on GitHub.|
|Star Castle||1980||2012||Arcade||Atari||Former Atari engineer D. Scott Williamson re-created in 3 years work Star Castle faithfully for the Atari 2600. After a successful crowdfunding campaign on Kickstarter, he released everything for free on his website, including source code.|
|Starcraft||1998||2014||Real-time strategy||Blizzard Entertainment||By static recompilation and reverse engineering of the original x86 binary to an intermediate C "pseudo-assembly" source code, an unofficial version for the Pandora handheld and the ARM architecture became available in 2014.|
|Strike Commander||1993||2013||Flight simulator||Origin Systems||In 2013 a SC reverse engineering project by Fabien Sanglard with a reconstructed source code variant became available on GitHub as the original source code was most probably lost in the take over of Origin by EA (Abandonware).|
|Super 3D Noah's Ark||1994||2015||FPS||Wisdom Tree||In October 2015 a community reconstructed, under usage of already released id software engine code, source code variant became available on bitbucket.|
|Syndicate Wars||1996||2010||Real-time tactics||Bullfrog Productions||In January 2010 a reverse engineering project of the MS-DOS-based Syndicate Wars was finished by two developers and builds for Windows, Mac and Linux were released. It's complete beside networking and joystick code.|
|Tennis for two||1958||2008||Arcade||William Higinbotham||In 2008 Tennis for Two, a video game from 1958 and one of the earliest video games, was recreated using partly modern parts.|
|The Great Escape||1986||2016||Arcade adventure||Denton Designs||David Thomas started in 2012 a reverse engineering project to create portable C source code from the DOS version's binary, which reached in January 2016 compiling state.|
|The Last Ninja||1987||2009||Action-adventure game||System 3 (software company)||Robert Crossfield reverse engineered a faithful engine from the Amiga version of the game since 2009. First three levels complete.|
|Touhou Project||1996||2014||Shoot 'em up||Team Shanghai Alice||"The Touhou PC-98 Restoration Project" was started around 2014 on github on base of found source code of libraries. In progress.|
|Transport Tycoon Deluxe||1994||2004||Business simulation game||Chris Sawyer/Microprose||In 2003, Ludvig Strigeus started to reverse engineer Transport Tycoon Deluxe and convert the game to C. In 2004, this re-engineered Transport Tycoon Deluxe was released and christened OpenTTD and is still under active development by the community.|
|Zorgons Revenge||1983||2014||Shooter||John Sinclair||Jean-François Fabre created binary translation libraries for Oric BASIC and assembly code to portable C and used it for nine games. Source code re-created and released for: House of Death, L'Aigle d'Or, Le Manoir du Dr Genius, Le Retour du Dr Genius, Rendez-vous de la Terreur, Xenon 1, Strip 21, Zebbie, Zorgons' Revenge. Build available for the OpenPandora.|
- Category:Commercial video games with freely available source code.
- List of open source game engines
- List of open source video games
- List of commercial software with available source code
- List of formerly proprietary software
- List of commercial video games released as freeware
- List of freeware games
- Source port
- A Dark Room goes open source on doublespeakgames.com (July 3, 2013)
- "Purchasing Abuse". Archived from the original on 2003-06-10. Retrieved 2007-09-07.
- Abuse 1996 - 20th anniversary source port on gog.com "Abuse SDL 0.9a:- Enabled custom resolutions and enabled lights on high resolutions - Re-enabled OpenGL rendering to enable vsync [...]- Added cheats via chat console: bullettime, god, giveall, flypower, sneakypower, fastpower, healthpower, nopower - XBox360 controller support with rebindable buttons "
- Abuse_1996 on github.com/antrad
- Herro, Mark (October 1980). "The Electric Eye" (PDF). The Dragon (42): 42–43 hardcopy (aka electronic pagenumbers 44–45 in archived PDF version). Retrieved 2015-07-11.
- Adams, Scott (July 1980). "Adventureland". SoftSide. p. 36. Retrieved 13 April 2015.
- Graham, Nelson (2001). The Inform Designer's Manual (PDF). Dan Sanderson. p. 358. ISBN 0-9713119-0-0.
- license.txt "Source code remains property of Black Forest Games GmbH and is free for non-commercial use only."
- gog.com team (2015-03-24). "Release: Airline Tycoon Deluxe". gog.com. Retrieved 2015-08-01.
Airline Tycoon Deluxe is a golden oldie with native versions for Mac OS X and Linux. As an added bonus, the package here comes with the game's Windows source code for your viewing and tweaking pleasure. You sure don't see that every day.
- AlienBash_src.readme This code is available under the following license, as stated by Mr. Glen Cumming in the above thread: "I am happy for every scrap of code on my disks to be made available to whoever wants it - I only ask that the really embarrassing stuff is erased (lots) and any potentially libelous messages (or swears) in any of the code/scrolling messages are removed."
- AlienBash I & II - Original Coder Contacted - Help Needed in Rescuing 68000 Source!! on eab.abime.net (2014)
- Alien Breed 3D by John Girvin "In March 1997, Team17 released the source code to AB3D’s sequel, “Alien Breed 3D II: The Killing Grounds” (known as TKG), on the cover CD of Amiga Format issue 95. It was megabytes of undocumented, disorganised, messy assembly language. Andy Clitheroe, the lone programmer of both games, must have been some kind of genius, I think. The official release was of the TKG source code. However, when poking around the CD I found the original (and equally messy) AB3D source too." (archived, 2009)
- Aliens Vs Predator - Source code update (January 4, 2013)
- AvP/trunk/License.txt The source code to Aliens Vs Predator is copyright (c) 1999-2000 Rebellion and is provided as is with no warranty for its suitability for use. You may not use this source code in full or in part for commercial purposes. Any use must include a clearly visible credit to Rebellion as the creators and owners, and reiteration of this license.
- http://cc3d.free.fr/cube.s Alpha Waves source code for Atari ST
- the-dawn-of-3d-games (2009)
- alpha-waves on sourceforge.com
- Akalabeth: World of Doom - Apple II (1979/80) on hardcoregaming101.net "Origin Systems for a time had the original Apple II source code of Akalabeth for download on their website's FTP server"
- aklabeth.zip on uo.com (archived)
- allegiancelicense.txt Microsoft Research Shared Source license agreement ("MSR-SSLA")
- Colayco, Bob (2004-02-06). "Microsoft pledges Allegiance to its fanbase". gamespot.com. Archived from the original on 2013-12-10. Retrieved 2011-07-22.
- AmuletsArmor on github.com
- source code "Yep, legal issues are now resolved. We're moving forward." (February 2013)
- Questions regarding codebase (October 2016)
- AmuletsArmor on github.com/emrecelikten
- Ares on amrosiasw.com
- Antares on arescentral.org
- Kurinnoy, Michael (2007-02-20). "AstroMenace Press Release" (PDF). Viewizard. Retrieved 2010-03-08.
- a_source on asylum.acornarcade.com
- sdl-asylum on sourceforge.net
- asylum on github.com
- jeff-minters-unreleased-konix-multisystem-port-of-attack-of-the-mutant-camels-preserved-a-due-for-release on retrocollect.com (2012)
- AOTMC89 "Konix Multisystem - Attack Of The Mutant Camels '89 V0.4 - Source Code" on github.com
- "Aquaria goes open source!". Wolfire Games blog. 2010-06-03.
- Juri Munkki (2016-10-30). "Avara game, originally released in 1996 for Mac OS". Retrieved 2016-10-30.
- Aztaka Developer’s Edition on amanitadesign.com (January 7, 2011)
- Aztaka Developer's Edition Released on gamershell.com (January 10, 2011)
- Barony on steam.com
- Barony on github.com
- Shrigley, Chris (2015-03-27). "batman-returns-sega-cd-3d-driving-game-source-code found". shrigley.com. Retrieved 2015-11-20.
- source code archive of Chris Shrigley
- Source code "Source code for Beneath a Steel Sky in Assembly language (415,225 bytes) xxxx" (2005)
- "Latest Developments". ScummVM.org. August 2, 2012. Retrieved July 14, 2013.
Support for Beneath a Steel Sky, made possible thanks to Revolution Software supplying us with the original assembly source code!
- Leyda, Jeff. "The Beyond Castle Wolfenstein Project - Beyond Castle Wolfenstein Project Quick FAQ". oldskool.org. Retrieved 2014-08-31.
Q) Do you have the rights to distribute this game? A) Hopefully! Silas Warner's wife has granted permission to release the source code and game executables as a small memorial of his work.
- Blades of Exile Source Code on spiderwebsoftware.com
- Benson, Julian (2013-07-08). "Blake Stone: Planet Strike source code released after almost 20 years". PC Games. Retrieved 2013-07-11.
- source code of Blake Stone with license
- Larabel, Michael (June 6, 2014). "id Software's Softdisk Open-Sources Some Really Old Games". Phoronix. Retrieved June 6, 2014.
- FlatRockSoft on github.com
- CatacombSDL on github.com/Blzut3
- Bell, John (2009-10-01). "Opening the Source of Art". Technology Innovation Management Review. Retrieved 2012-12-30.
[...]that no further patches to the title would be forthcoming. The community was predictably upset. Instead of giving up on the game, users decided that if Activision wasn't going to fix the bugs, they would. They wanted to save the game by getting Activision to open the source so it could be kept alive beyond the point where Activision lost interest. With some help from members of the development team that were active on fan forums, they were eventually able to convince Activision to release Call to Power II's source code in October of 2003.
- "Canabalt "Open Source" Details, Licensing and Extra Information". December 31, 2010. Archived from the original on 2013-05-25. Retrieved 2013-06-06.
- Hodgkins, Kelly (2010-12-31). "Popular indie game Canabalt goes open source". tuaw.com.
The developers behind Canabalt confirmed that the game's source code will be made available as part of an open source project. The game will be licensed under the MIT Open Source license, which will let other developers use the engine source code in its entirety for both personal and commercial projects. While the code powering the game is available for the world to use, the game art, sounds, animations and Canabalt game-specific code is still proprietary.
- Petitte, Omri (20 March 2014). "Cart Life exits Steam, goes open source". PC Gamer. Retrieved 21 March 2014.
- Die geheimen Projekte des Richard Hofmeier on indiegames.ch (May 2015)
- cartlife_src on github.com
- Product_2K_Games_Firaxis_Release_Civ_IV_SDK on gamasutra.com
- civ4 downloads on 2kgames.com
- Kosak, Dave 'Fargo' (27 October 2005). "GameSpy: Civilization IV". GameSpy. pp. 1–3. 662218. Archived from the original on 6 December 2013. Retrieved 24 October 2009.
- Civ4: Better AI on sourceforge.net "Major improvements to AI naval and air unit handling [...] Well over 100 bug fixes"
- (Polish) Announcement on Polish fan community page
- Jerz, Dennis (2007). "Somewhere Nearby is Colossal Cave: Examining Will Crowther's Original "Adventure" in Code and in Kentucky". Digital Humanities Quarterly. Seton Hill University.
- David Kinder's guide to Adventure downloads at the Interactive Fiction Archive
- Colossal Cave Adventure Source Code on jerz.setonhill.edu (2007)
- Let's get Keen Dreams re-released legally !
- commander-keen-keen-dreams-source-code-released on slashdot.org
- Keen source code on GitHub
- GOG.com (2013-12-09). "Classic Gem Promo: Conquest: Frontier Wars". cdp.pl.
- Conquest: Frontier Wars on GOG on robertsspaceindustries.com
- Larabel, Michael (2012-11-02). "CoreCode's CoreBreach Game Goes Open-Source". Phoronix. Retrieved 2013-06-22.
- "Crytek GmbH: Crytek announces its Game Engine CryENGINE". Wayback Machine. 2008-11-15. Retrieved 2016-10-30.
- Crytek's Video Game Engine Is Now Free by Jason Schreier on Kotaku (15-03-2016)
- CryEngine V releases today on a pay-what-you-want basis by Shaun Prescott on PC Gamer (March 16, 2016)
- Crystal Mines (Source Code) (NES Game) on pdroms.de (Aug 26, 2011)
- Post subject: Crystal Mines Source Code Released on nesdev.com (August 2011)
- Crystal%20Mines%20(NES)%2011151989%20Version.zip in "Crystal Mines License.txt" "Ken's license: - The name "Crystal Mines", the graphics, sound, music, and the levels are NOT open source. People other than me worked on them, and for that version of the game actually got royalties and still have ownership. It's OK to possess them for personal use, but they can't be reused in a new game or distributed for profit. - As the sole author of the code, I (Ken Beckett) will allow the source code for the NES version to be used in other works, provided that: A) Credit is given to 'Ken Beckett' in both the portions of re-used source code AND in the credits of the new game, and B) That the code is modified sufficiently such that the new game is not easily recognizable as being Crystal Mines with new graphics/sound/music. -Ken"
- cylindrix on hardgeus.com (archived)
- Cylindrix on github.com
- the citadel source code (October 2007)
- Cytadela - need help in porting to AmigaOS on amigaworld.net (31-Jan-2007)
- Cytadela project - a conversion of an Amiga first person shooter on cytadela.sourceforge.net
- LeBreton, Jean Paul; Romero, John (2015-01-20). "Devs Play" S01E05 - Doom (Part 8 - Map 6 Central Processing) 60fps [8/10]. YouTube. Double Fine Productions. Event occurs at 5:56. Retrieved 2015-12-12.
- daikatana 1.3 on bitbucket.com
- Palestar. "Medusa Engine License", retrieved January 22, 2010.
- Drafell. "Medusa Engine Source Code Released", DarkSpace Development Blog, June 21, 2009. (Accessed Jan 22 2010)
- D2X-XL sourceforge repository
- Dunkin, Alan (1998-01-26). "Descent Source Code Released". gamespot.com. Retrieved 2013-01-13.
Parallax Software, the software developer that created the popular three-dimensional action games Descent and Descent II, has released Descent's source code (version 1.5) to the public domain for noncommercial purposes.
- "Descent 3 - Past Headlines - 1999". Outrage Entertainment. Archived from the original on 2007-02-03. Retrieved 2007-02-07.
- OldeSkuul on facebook.com "we are seriously conisdering source code releases" (2014)
- Jason Rohrer (2011-10-17). "DiamondTrust/ci/default/tree". SourceForge. Retrieved 2013-05-22.
- whatsnew.html on Digger.org
- download on digger.org
- Dink-Smallwood-Source-License Please keep in mind while I'm sharing the source, I am not sharing the media, if you would like to use or distribute the Dink Smallwood artwork, this requires express permission.
- Find free sounds for FreeDink
- Freeware releases "The rights situation has been resolved, and Terry Pratchett and his agent Colin Smythe have approved the source release and future freeware re-issuing of the game. We are currently awaiting receipt of the engine source code." on adventure-treff.de (2005, in German)
- Discworld Source Code Retrieved – ScummVM Developers Thrilled and Already Coding by James Woodcock (May 2008)
- discworld-revisited 2008-07
- "TTimo/doom.gpl3". GitHub. 2011-11-22. Retrieved 2011-11-23.
- Dragonfire source on atariage.com
- Dragonfire Source Code at atariage.com "Really, it was Bob that wanted his source in the public domain." (2003)
- [stella] Source code for Dragonfire from Bob Smith on biglist.com
- Source Code on forum.caravelgames.com
- History of DROD
- deadly-rooms-of-death (2008)
- SourceCode on forum.caravelgames.com "Yes, you can have all of the source code to the engine for our commercial products, DROD: King Dugan's Dungeon, DROD: Journey to Rooted Hold, DROD: The City Beneath, DROD: Gunthro and the Epic Blunder, DROD: The Second Sky, and DROD RPG: Tendry's Tale. You just can't have all the media, i.e. the levels, in-game writing, graphics, music, sound effects, and voice samples."
- buildsrc "04/01/2003: Duke Nukem 3D source code released by 3D Realms."
- Grant of license to reproduce Dungeons of Daggorath by Douglas J. Morgan "I hereby grant a non-exclusive permanent world-wide license to any and all Color Computer site administrators, emulator developers, programmers or any other person or persons who wish to develop, produce, duplicate, emulate, or distribute the game on the sole condition that they exercise every effort to preserve the game insofar as possible in its original and unaltered form. [...] Anyone willing to pay for the copying of the listing (at Kinko's) and shipment to them, who intends to use it to enhance or improve the emulator versions of the game is welcome to it."
- Matt Barton (13 October 2006). "A Review of DynaMicro's The Dungeons of Daggorath (1982)". Armchair Arcade.
Programmers and coders may also be interested in the source code should email Louis Jordan. Before doing so, check out the License Grant offered by Doug Morgan, former president of Dyna Micro. Apparently he's willing to give the code to anyone willing to cover the costs of shipping and copying (at Kinko's) the listing.
- Project Page for Dungeons of Daggorath PC-Port by Richard Hunerlach (August 28, 2002, archived)
- DoD for Linux 0.51 Linux version with source code (2012)
- Eat The Whistle goes GPL! on hurricane-studios.ath.cx (archived)
- Eat the Whistle on ggsoft.org
- Owen, Dave (2014-04-16). "Eldritch developer releases source code for free". VG247. Retrieved 2015-01-18.
- Eldritch-Source-2014-04-14.zip on eldritchgame.com
- Ian Bell's Elite pages - November 1999 : Elite 15th Anniversary - Released the program sources
- Bell, Ian (1999-11-01). "Elite Archives ----The Files----". iancgbell.clara.net. Archived from the original on 2000-11-18. Retrieved 2015-11-06.
- David Braben's Legal Threats to the Elite Home Page on Ian Bell's webpage (updated 19/09/14)
- Braben, David. "I am David Braben, co-creator of Elite, creator of Frontier, Frontier II and the upcoming Elite: Dangerous". Reddit AMA. Retrieved 30 December 2012.
- "Bell and Braben See Eye-to-eye as Original Elite Sees Dual Re-release". cabume.co.uk. 25 September 2014. Archived from the original on 2015-04-13.
- "Alan Turing at 100". Harvard Gazette. Retrieved 2016-02-22.
- Coders at Work: Bernie Cosell
- The Genealogy of Eliza
- Big Computer Games: Eliza - Your own psychotherapist on atariarchives.org
- The Genealogy of Eliza by Jeff Shrager
- Empire Interactive (Europe) Limited Licence Agreement for Razorworks' "Enemy Engaged RAH-66 Comanche Versus KA-52 Hokum"
- EECH DevZone (archived)
- "The End of an Era!". Windward. 2005-10-01. Archived from the original on 2005-11-24. Retrieved 2013-10-26.
October 1, 2005: We just sold the last copy of Enemy Nations. [...] If you have a copy and want to give a copy to a friend - you have our permission to burn a CD with a copy of Enemy Nations - with one major caveat. You must give them the game. You cannot sell it to them. You cannot include it as part of anything you sell. It cannot be included with any product or magazine as a free extra. The person making the copy must even buy the blank CD. It must be a true free gift given totally separate of anything else.
- source code mirror at atomicgamer.com
- get-your-very-own-free-and-legal-copy (January 2006)
- "License for Original Code". launchpad.net/enations.
This is released under a limited license: 1) No rights are given to the game Enemy Nations, the trademark Enemy Nations, or the concept. 2) Windward intends to someday create an Enemy Nations II and reserves all rights for all future versions of the game. 3) You may not sell anything derived from this code, art, or anything else included. 4) This is released solely for people to learn from the code and to make fixes in the existing code that they will make available for free. If you don't like these restrictions, don't use this code/data.
- Bertolone, Giorgio (2011-03-12). "Interview with Kevin Klemmick - Lead Software Engineer for Falcon 4.0". Cleared-To-Engage. Archived from the original on 2011-03-18. Retrieved 2014-08-31.
[C2E] In 2000 the source code of Falcon 4.0 leaked out and after that groups of volunteers were able to make fixes and enhancements that assured the longevity of this sim. Do you see the source code leak as a good or bad event? [Klemmick] "Absolutely a good event. In fact I wish I’d known who did it so I could thank them. I honestly think this should be standard procedure for companies that decide not to continue to support a code base."
- "FreeFalcon". GitHub. 2013-01-24. Retrieved 2013-09-11.
- You can get it here. on thatgamecompany.com by Jenova (Sep 21, 2009)
- flOw.source.zip on jenovachen.com
- IgorLabs classic games page
- FortApocalypse on Github.com
- Free Fall on Ian Bell's website "I wrote Free Fall in 1982/3 for the BBC Micro. It was published by Acornsoft in 1983. I like to describe Free Fall as the first ever beat-em-up so as to claim, with tongue somewhat in cheek, to have invented two gaming genres."
- Sulic, Ivan (2002-04-25). "Freespace Source Code". IGN. Retrieved 2013-01-11.
- Kristina Simpson (2015-04-26). "LICENCE". anura-engine - GitHub. Retrieved 2015-10-10.
- Humble Indie Bundle's Source Releases by Iwan Gabovitch "Another game which is commercial (on iDevices) and has FOSS code and closed art [...] is Frogatto." (April 22, 2011)
- Frogatto by Lost Pixel on itunes.apple.com
- "Frogatto & Friends for iPhone, iPod touch, and iPad on the iTunes App Store". Retrieved 2012-03-03.
- "BlackBerry App World: Frogatto". Retrieved 16 March 2012.
- License "CC-BY 3.0 LICENSE [...] assets under copyright" on github.com/frogatto
- Brány Skeldalu (aka The Gates of Skeldal) is ready for testing on trisquel.info
- skeldal on sourceforge.net
- "Brány Skeldalu Download, English Patch (Beta) :: DJ OldGames". oldgames.sk. Retrieved 18 January 2014.
- von Eitzen, Chris (2010-06-10). "Indie game Gish source code released". h-online.com. Archived from the original on 13 November 2012. Retrieved 2013-01-13.
- "Gish goes open-source". Wolfire Games blog. 2010-05-30.
- Calhoun, John (2016-01-29). "Sources for the Macintosh game, Glider PRO, written by John Calhoun and published by Casady & Green Inc.". GitHub.
- Calhoun, John (2016-01-31). "Added legal section to read me. · softdorothy/glider_pro@49a35bb · GitHub". GitHub. Retrieved 2016-03-16.
- tinyspeck (2013-11-18). "Glitch is Dead, Long Live Glitch! - Art & Code from the Game Released into Public Domain". glitchthegame.com. Retrieved 2013-12-11.
The entire library of art assets from the game, has been made freely available, dedicated to the public domain. Code from the game client is included to help developers work with the assets. All of it can be downloaded and used by anyone, for any purpose.
- Blackwell, Laura (2013-11-18). "Afterlife of an MMO: Glitch's offbeat art enters public domain". pcworld.com. Retrieved 2013-12-11.
- Get a window into classic Mac dev with Glider source code by Christian Nutt on gamasutra.com (February 12, 2016)
- Calhoun, John (2016-01-29). "The shareware game from the Macintosh written by John Calhoun in the 90's.". GitHub.
- glypha-a-joust-like-game-now-on-iphone-for-free on toucharcade.com (2009-07-07)
- Glypha - Then and Now on boredzo.org/glypha
- glypha on ksuther.com
- Sebayang, Andreas (2009-03-23). "Gothic 3 Community Patch soll fast alle Fehler beheben - Mehr als 700 Veränderungen im letzten Community Patch" (in German). Golem.de. Retrieved 2013-01-06.
Das Team hatte Zugriff auf den Quellcode von Gothic 3. Zusätzlich wurde auch inhaltlich an dem Spiel gearbeitet, da laut Patch Team ein Beheben aller Fehler nicht allein durch das Verändern des Quellcodes möglich war.
- Jens Andersson & Jan Kronqvist (2008-09-21). "The Gravity-Force 2 Homepage". lysator.liu.se. Retrieved 2013-10-13.
Jan made an archaeological expedition and recovered the GF2 source code from a dusty old floppy disc! We do not pretend it is a wonder in coding style (in fact, it is a complete disaster!), but for primarily nostalgic interest we publish it here.
- contact on irrgheist.com (archived)
- H-Craft Championship Purchase "In order to purchase H-Craft Championship please visit our reseller www.Manifestogames.com" (2007)
- H-Craft Championship CDnavigator.ru
- H-Craft Championship Freeware release announcement in Reddit
- H-Craft Championship Irrgheist News, February 25, 2015
- H-Craft Championship - H-Craft Source Code on irrgheist.com
- "Bringing Habitat Back to Life". pastemagazine.com. Retrieved 2016-02-22.
- "The Habitat Hackathon". The Museum of Art and Digital Entertainment. Retrieved 6 June 2016.
- Francis, Bryant (2016-07-06). "Source code for Lucasfilm Games' '80s MMO Habitat released". Gamasutra. Retrieved 2016-07-06.
- Lucasfilm Games' MMO 'Habitat' source code released by Brittany Vincent on Engadget.com (2016-07-07)
- Double Fine Releases Source Code for Hack ‘n’ Slash by Garrett Glass (on September 11, 2014)
- Hack ‘n’ Slash Leaves Early Access, Brings Source Code on Rock, Paper, Shotgun by Ben Barrett (September 10th, 2014)
- Hacker Evolution Source code
- episodes on hero.handmade.network
- Largent, Andy (2003-10-08). "Homeworld Source Code Released". insidemacgames.com. Retrieved 2012-12-23.
- Macintosh Homeworld
- pandorapress staff (2011-06-23). "Game of the Week #3 – Homeworld SDL". pandorapress.net. Archived from the original on 2011-08-30. Retrieved 2013-04-24.
[…] released port of HomeworldSDL. […] enables your Pandora to experience the excellent work done by the guys at HomeworldSDL.
- (Announce) Homeworld (updated 2012/12/03) on maemo.org
- Homeworld (from 1999) on Android. on youtube (8 June 2014)
- Homeworld to Android on beloko.com (2014)
- Homeworld source code licence on homesource.nekomimicon.net (2012)
- BugsMenot (2013-04-01). "Congratulations on the purchase of Homeworld IP! Re-licensing of code requested.". gearboxsoftware.com. Retrieved 2014-08-11.
[...]it was deemed pretty much impossible to continue to do anything with the released source code that was made available.[...]We just ask that the already released source code be made available under a GPL V2.0 or higher license and hosted on Github.
- BurlesonGBX (2013-09-05). "Re: HW source now?". gearboxsoftware.com. Retrieved 2014-08-11.
The license agreement for the original release of the source still stands.[...] If someone is interested in doing something under a different license using the old opensource code, there is always room to talk.
- "/trunk/license.txt – HoverRace". Svn.igglybob.com. 2008-11-29. Retrieved 2013-01-05.
- Source Code License (2008-11-29)
- Here’s the source code to Hundreds. Don’t laugh. by Greg Wohlwend on intuitiongames.com (October 25, 2010)
- McWhertor, Michael (January 3, 2013). "Hundreds' metamorphosis from late night dream to addictive iOS puzzle game". Polygon. Vox Media. Archived from the original on June 7, 2014. Retrieved June 7, 2014.
- Martin, Garrett (January 22, 2013). "From Flash to Touch: How Hundreds Came to the iPad". Paste. Wolfgang's Vault. Archived from the original on June 8, 2014. Retrieved June 8, 2014.
- In Pursuit of Greed (Game + Source)
- greed on redshadowsoftware.com
- in-pursuit-of-greed on duke4.net (2014)
- After 15 years, a cancelled Game Boy RPG finds life on PC on pcgamer.com by Steven Messner (August 16, 2016)
- infinity on github.com/infinity-gbc
- Infinity Released (August 13, 2016) on affinix.com "Today we are pleased to announce the release of Infinity for Game Boy Color in unfinished form! We've made a ROM file available, as well as the source code."
- gameSource on sourceforge.net
- Inside a Star-Filled Sky (Public Domain For-Pay) + Video Review + Jason Rohrer on open source on freegamer.blogspot.de (March 2011)
- Latest Patches on ironseed.com (March 24, 2013)
- Burnes, Andrew (2004-02-25). "Jagged Alliance 2 Source Code To Be Bundled With Wildfire". ign.com. Retrieved 2012-12-23.
- JA_UB on kermi.pp.fi
- labflsrc.zip on advsys.net 2001
- LAB3D/SDL project page
- LAB3D-SDL + Hires texture support
- Kiloblaster Allen Pilgrim declared Kiloblaster freeware and released the source code.
- Xargon Allen Pilgrim on pyra-handheld.com "I own the copyright for the game and have released the entire trilogy as freeware. The source code is also released as freeware. I am perfectly fine with people creating ports of the game and using all the assets for those ports. What I do not authorize is someone taking the assets and creating a new game."
- Amiga Games
- Kumquat & Cantaloupe - Full Games and Source on 22 November 2012
- LemminGS source code on brutaldeluxe.fr
- David H. Ahl (April 1982). "Six Business Management Games" (jpg). 8 (4). Creative Computing: 28, 30.
- lemonade-source.zip on strout.net
- Lemonade Stand on Codenautics "Lemonade Stand is both free and open-source"
- lemma-follows-in-the-footsteps-of-bastion-mirrors-edge on Rock, Paper, Shotgun (2014)
- lemma-first-person-parkour (2014)
- lemmagame.com (2014)
- Lemma on github.com
- Lugaru goes open source Wolfire Blog, May 11, 2010
- wooga-veroeffentlicht-quellcode-von-html5-spiel-magic-land-island on browsergame-magazin.de (in German, 2012)
- Pocket Island on github.com
- RonnyMagus on github.com
- "Marathon 2 Source Code Released". mactech.com. 2000-01-17. Retrieved 2012-12-25.
Today at 7 pm CST Bungie Software releases the Mac source code for their classic game "Marathon 2: Durandal" to the net.
- Keller, Brian (2006-03-22). "MechCommander 2 EULA". Social.msdn.microsoft.com. Retrieved 2013-12-29.
- Fleshbourne, Daniel (2006-08-18). "Microsoft MechCommander 2 Shared Source Release". neowin.net. Retrieved 2012-12-30.
This is the Shared Source release for MechCommander 2. This release contains all of the source code and source assets required to build MechCommander 2. This release can be used with the Microsoft XNA Build March 2006 Community Technology Preview (CTP).
- megaball on snappymaria.com (June 12, 2012)
- megaball on bitbucket.org
- Andrew Kirmse, Chris Kirmse (2012-09-15). "License for Meridian 59 v1.0". GitHub. Retrieved 2013-10-08.
This source code is distributed under the terms of the GNU General Public License with the following special exception. As a special exception, the copyright holders of this program give you permission to link this program with the accompanying files wrap.dll and waveplay.dll.
- License.txt on github.com
- official-license-post on nooskewl.com (Trent, May 13, 2012)
- Monster RPG 2 Now Free and Open Source on nooskewl.com (November 11, 2012)
- Monster RPG 2 To Go Non-Free After Succesfully Crowdfunding To Become Open Source UPDATED on gamingonlinux.com by liamdawe (October 2013)
- Mitchell, Robert (2001-11-19). "The Return of MiG Alley?". combatsim.com. Retrieved 2013-01-06.
Bob Mitchell: What has prompted you to release the source code for MiG Alley and Battle of Britain? Dave Whiteside: Because we are no longer doing flight sims [after Empire took us over at the end of 2001], and we would not be able to publish any patches that were required [no money was allocated to this], rather than let MiG die and all the code sit doing nothing it was considered a good idea, a swan song, if you like, for Rowan [after 13 years in the flight sim market].
- migalley.exe source code mirror
- Mr.Do! GameBoy source text file by Wesley Knackers (2007, archived)
- Mr. Do! on pauliehughes.com
- Wen, Howard (2004-06-10). "Keeping the Myths Alive". linuxdevcenter.com. Retrieved 2012-12-22.
[...]fans of the Myth trilogy have taken this idea a step further: they have official access to the source code for the Myth games. Organized under the name MythDevelopers, this all-volunteer group of programmers, artists, and other talented people devote their time to improving and supporting further development of the Myth game series.
- Myth II 1.7.2 Released for Linux! on projectmagma.net (28 Feb 2012)
- Thomsen, Michael (2011-08-24). "Building With Someone Else's Blocks: Going Open Source With Games". Gamasutra. p. 2. Retrieved 2013-10-25.
[...] the game struggled to attract subscribers and was canceled after its first year. Disappointed with the turn of events, Cyan decided to release Myst Online: Uru Live as an open source game in 2010 hoping fans would be able to give the game a new life.
- "unknownworlds / NS". GitHub.
EXCLUDED CODE: The code described below and contained in the Natural Selection Source Code release is not part of the Program covered by the GPL and is expressly excluded from its terms.
- Unknown Worlds unleashes Natural Selection source code by Jenna Pitcher on Jan 23, 2014 at Polygon.com
- nanosource on pangeasoft.net
- No Gravity (Classic) on sourceforge.com
- nothingtohide.cc (archived)
- Nothing to hide license on github.com
- Nothing To Hide Is A Very Smart Anti-Stealth Game by John Walker on Rock, Paper, Shotgun (on February 12th, 2014)
- Demo + Crowdfunding: anti-stealth game Nothing To Hide takes its name literally by Anthony Swinnich on indiegames.com (February 16, 2014)
- Attention game designers: Public Domain Jam! on creativecommons.org by Matt Lee (May 16th, 2014)
- nolf2-source-released-but-to-what-end (July 2011)
- Sierra has released the No One Lives Forever 2 Toolkit on gamershell.com
- Get a window into classic Mac dev with Glider source code by Christian Nutt on Gamasutra (February 12, 2016)
- Calhoun, John (2016-01-29). "Sources to Pararena, the commercial Macintosh game by John Calhoun, published by Casady & Greene, Inc.". GitHub.
- Paradox Interactive - Penumbra: Overture premieres game on Gamer's Gate
- "Penumbra: Overture Game And Engine Source Code Released For Free". MegaGames. 2010-05-14. Retrieved 2013-10-11.
- I just pushed the source for Pinball Construction Set to github (thanks to Scott Cronce at EA) by Bill Budge on twitter.com
- Budge, Bill. "billbudge/PCS_Atari800". GitHub. Retrieved February 13, 2013.
- Budge, Bill. "PCS_AppleII". GitHub. Retrieved February 13, 2013.
- Adams, Scott (December 1980). "Pirate's Adventure". BYTE. p. 192. Retrieved 18 October 2013.
- "Adventurous Bugs". BYTE. April 1981. p. 302. Retrieved 18 October 2013.
- Isokawa's Original HuBasic Source Code scanned from Oh!MZ August 1985
- Hardcore Gaming 101, Who created PITMAN? on hardcoregaming101.net (2011)
- The Untold History of Japanese Game Developers DVD review by Tom Massey on Eurogamer "Pitman creator Yukata Isokawa's emphatic emotional response to receiving a long-lost magazine featuring his original source code is particularly memorable." (2014-09-12)
- The (almost) original version of Pitman (Catrap) preserved (July 19, 2012)
- pixeldungeon on pixeldungeon.watabou.ru
- open source on pixeldungeon.tumblr.com (2014)
- "We're going to release the POSTAL 1 source code soon, but only if someone promises to port it to the Dreamcast." on twitter.com/RWSbleeter (2015)
- POSTAL 1 running on Open Pandora. P1 is being opened sourced in the near future! on twitter.com/RWSbleeter (2016)
- Postal Source Code by ptitseb "Things are progressing... Stay tuned." (2016)
- The Original POSTAL Has Been Made Open Source on runningwithscissors.com (December 28, 2016)
- license at bitbucket.org/gopostal/postal-1-open-source/src
- Three Atari 8-bit games source code have been released on commodore.ninja by Paulo Garcia (Jan 5, 2016)
- Ciolek, Todd (2012-10-17). "Among the Missing: Notable Games Lost to Time". 1up.com. Retrieved 2015-06-19.
Prince of Persia creator Jordan Mechner believed that the source code to the game's original Apple II version was gone when he failed to find it in 2002. Ten years later, Mechner's father uncovered a box of old games at the family home, and among them were disks containing Prince of Persia's bedrock program.
- Mastrapa, Gus (2012-04-20). "The Geeks Who Saved Prince of Persia's Source Code From Digital Death". Wired. Retrieved 2012-11-30.
- SDLPoP on github.com
- parallelrealities.co.uk/LICENSE LICENSE webarchive versions
- Debian bug #546800 - RM: starfighter -- RoM; copyright infringement on bugs.debian.org
- Chalk, Andy (August 8, 2016). "Quadrilateral Cowboy's source code has been released to the public". PC Gamer. Retrieved August 8, 2016.
- QC source code on blendogames.com
- source/ on ftp.idsoftware.com
- Official PuppyGames Blog
- "Revenge of the Source Code". Puppy Games. 2011-04-20. Retrieved 2011-08-23.
- roboforge on ign.com
- source on sroboforge.altervista.org
- rocky racers on mobygames
- sourcecode (July 2004)
- sourcecode on positech.co.uk/rocky
- source code mirror
- RuneSword 2 FREE! on crosscutgames.com (2004-04-17)
- runesword 2 on sourceforge.com
- Wiesner, Thorsten (2004-04-19). "Rollenspiel RuneSword 2 ist ab sofort Open Source - Kompletter Source Code steht zum Download bereit" (in German). golem.de. Retrieved 2015-08-04.
- Free Ryzom campaign (archived)
- "Virtual Citizenship Association - Virtual Worlds, Real Citizens". Virtualcitizenship.org. Archived from the original on 2007-10-29. Retrieved 2009-10-14.
- "Breakthrough for Free Software Gaming--Ryzom Announces Full Release of Source Code and Artwork, and a Partnership with the Free Software Foundation to Host a Repository of the Game's Artistic Assets". ryzom.com. Retrieved 2010-05-06.
- "Ryzom is opening a new website for its Free Software NeL 3D MMORPG engine.". Ryzom. 2008-09-08. Retrieved 2009-10-14.
- Peterson, Dale (1983). Genesis II, Creation and Recreation with Computers. Reston Pub. Co. p. 182. ISBN 978-0-8359-2434-4. Retrieved 2008-09-13.
- Blank, George (December 1978). "Santa Paravia en Fiumaccio". SoftSide. Retrieved November 15, 2014.
- The Software Encyclopedia. Bowker. 1985. p. 343. Retrieved 2008-09-13.
- Knox, Thomas (November 29, 2003). "paravia.c". PlanetSourceCode. Archived from the original on November 29, 2014. Retrieved November 15, 2014.
- "linuX-gamers.net - Savage: The Battle for Newerth now Freeware". linux-Gamers. Archived from the original on June 8, 2008. Retrieved 2008-11-02.
- Newerth Savage XR - About us on newerth.com "In 2007 Newerth.com acquired the source code for Savage: The battle for Newerth and announced its continued development with the implementation of new features and content into the game via a patch named XR, incorporating previous community modifications."
- Croteam Open-Sources The Serious Engine by Michael Larabel on Phoronix (11 March 2016)
- "Serious Sam's Serious Engine source code release". Croteam. 2016-03-11. Retrieved 2016-03-12.
- Shadowgrounds license on code.google.com
- Larabel, Michael (2011-04-22). "Frozenbyte Open-Sources Shadowgrounds Games". Phoronix. Retrieved 2011-05-06.
- "Going Open Source!". soaos.sourceforge.net. 2003-06-23. Retrieved 2011-08-02.
In order to give the Siege game an extended practical life, allow ongoing player support, give the game a chance to be made available on other platforms, and to share our technical learning experience with the game development community, the Board of Directors at Digital Tome LP have agreed to release the Delphi source to the Siege game to the Open Source community under an LGPL license!
- micropolis license on donhopkins.com
- Simser, Bil (2008-01-10). "SimCity Source Code Released to the Wild! Let the ports begin...". weblogs.asp.net/bsimser. Retrieved 2012-12-30.
[...]Don Hopkins got a lot of work done on the finishing touches on releasing the original SimCity source code under the GNU General Public Library (GPL). The code won't have reference to any SimCity name as that has all be renamed to Micropolis. Micropolis was the original working title of the game and since EA requires that the GPL open source version not use the same name as SimCity (to protect their trademark) a little work had to be done to the code.
- "Al Lowe Downloads game history". 2007. Retrieved 2007-03-21.
- softporp.zip on ifarchive.org
- Al Lowe. "Softporn". allowe.com. Retrieved 2015-08-14.
Before there was a Leisure Suit Larry, Chuck Benton created the only non-graphic game Sierra ever sold, Softporn for the Apple ][. I later used its puzzles as the basis for LSL1: Leisure Suit Larry in the Land of the Lounge Lizards. Still later, Gary Thompson reprogrammed it for the IBM PC. Here's your chance to see whether the changes I made to this classic game were improvements or not! Click here to download "Softporn" and see 1981 for yourself!
- Clark, Dave (2000-10-29). "Sopwith Code Support". Retrieved 2006-12-01.
- Clark, Dave. "Sopwith – Source Code". Dave Clark's Home Page. Retrieved 2006-12-01.
- news archived 2000
- snowboarding-soul-ride-engine-goes-gpl on slashdot.org
- 20 Jan 2003 - Soul Ride Engine goes GPL on soulrider.com
- derelictgames / Spacebase V2 Updated Code on gitlab.com "This is a community maintained fork of DoubleFine's original game, which was open sourced May 12, 2015 under the Common Public Attribution License"
- Plunkett, Luke (2015-10-06). "Fans Keep Working On Cancelled Strategy Game". Kotaku. Retrieved 2015-10-06.
- O'Connor, Alice (2015-05-15). "Space Engineers Shares Source Code". Rock, Paper, Shotgun. Retrieved 2015-06-16.
- Rosa, Marek (2015-05-14). "Space Engineers – full source code access, total modifications and 100,000 USD fund". marekrosa.org. Retrieved 2015-06-16.
Today we have a very important announcement for our modders and our community. We decided to give you 100% complete access to Space Engineers’ source code. This comes as a continuation of our decision to give more freedom to modders and community.
- SpaceEngineers on GitHub
- LICENSE.DOC on github.com/id-Software/wolf3d
- Speed Haste Game Source Code on github.com (February 13, 2012)
- Wen, Howard (2005-08-11). "The Ur-Quan Masters". linuxdevcenter.com. O'Reilly Media. Retrieved 2016-01-19.
When the original developers of Star Control 2 contacted the online Star Control fan community, they presented an enticing question: if they released the source to the 3DO version of Star Control 2 under GPL, would anybody be interested in porting it to modern-day computers? Michael Martin, a 26-year-old Ph.D. student at Stanford University, answered the call. After removing proprietary 3DO-specific components from the code, the developers released the source for Star Control 2 to the public.
- AtariStarRaidersSourceCode on the Internet Archive (October 16, 2015)
- Star Raiders (Version 25.1/Stardate "26-JUL-79") on github.com/XioNYC
- Starraiders on github.com/lwiest
- Elite Force 2 - Quellcode veröffentlicht PC Games (06 November 2003)
- Elite Force I and II Tools and File - Elite Force II EF2 Source Code on eliteforce.gamebub.com
- Plunkett, Luke (2013-04-03). "Lucasarts' Closure Convinces Developers To Release Awesome Star Wars Source Code". Kotaku. Retrieved 2013-04-04.
In the wake of Lucasarts' closure today, Raven - the developers of the thoroughly excellent Jedi Outcast - have decided to release the source code for the game. Oh, and the code for its sequel, Jedi Academy, as well.
- Rubin, Brian (2012-01-16). "Starshatter: The Gathering Storm Goes Open Source!". spacegamejunkie.com. Retrieved 2013-01-08.
Apparently the excellent and unique military space sim, Starshatter: The Gathering Storm, has gone open source thanks to its original developer releasing the source code. [...]: "14 DEC, 2011 – STARSHATTER:THE GATHERING STORM – Open Source Version 5.0.5. This download Includes the cumulative Starshatter-TGS game up to version 5.0.5 (No CD Required). It is available for download from our “Lagacy Official File” section."
- doctorfrog (2012-02-06). "Because Stars Matter: Starshatter (Sci-Fi Flight Sim) is Free!". drfrog.wordpress.com. Retrieved 2012-01-08.
Starshatter: The Gathering Storm is a moderately complex, moderately realistic, spaceborne military flight sim that takes place in a series of dynamic campaigns.
- source on digital-eel.com
- sais on infinitespacegames.com "After being sold for several years by Cheapass Games, Strange Adventures in Infinite Space was released as free software and its source code was made available under the GNU General Public License. Go to the Strange Adventures in Infinite Space website to download the game, source code and various other goodies"
- Villarreal, Samuel (December 12, 2014). "Strife Veteran Edition GPL Source Release". GitHub. Retrieved July 1, 2016.
- IamA Founder of Night Dive Studios, Stephen Kick - We track down and restore classic video games! AMA! by Stephen Kick on reddit.com "Lost source code is one of the things that genuinely depress me and we're currently evaluating the idea of releasing the code we've discovered and restored to anyone who wants to store it or modify it.[...] We have released the source to Strife: Veteran Edition and we are planning on releasing more code in the future." (22 June 2016)
- System Shock Remake Feedback Request - Night Dive Studios on systemshock.org "We've also tracked down the source code to the original game and will be releasing it to the community once it's ready." (10 February 2016)
- stellar_frontier_source_eula.txt STARDOCK SHARED SOURCE STELLAR FRONTIER LICENSE (mirror)
- "Stellar Frontier Source Code - Released". stellarfrontier.ss-network.net. 2008-11-18. Archived from the original on 2009-12-31. Retrieved 2013-10-13.
As of Tuesday, November 18, 2008, the Stellar Frontier source code has officially been released by Stardock Corporation. End-User License Agreement was updated June 19th 2010.
- Stellar Frontier Development Log on nexus.stellarfrontier.net/
- SLF_SOURCE on github.com
- Super Lemonade Factory releases source code by Initials Video games (July 27, 2012)
- Brian Fitzgerald grants release of source code to TAXMAN, Pac-Man clone (August 7, 2015)
- source-code-to-be-taxman-released (August 7, 2015)
- taxman on github
- 47-TEK ships Team 47 GoMan for 10 D3D chips from www.47-tek.com on groups.google.com (November 1997)
- source (archived April 2009)
- 47-TEK gibt "Team 47: GoMan" Source Code frei by Christian Klass on golem.de (May 6, 1998)
- Looking for source code for Team 47 GoMAN on vogons.org (2012)
- TelengardListing.pdf on atarihq.com
- Telengard Remaster 1.1 on the C-64 scene database (2016)
-  "I have access to Terminal Velocity, Fury3, and Hellbender's official source codes."
- Velocity/Fury3/Hellbender modern port WIP on vogons.org (July 2015)
- CastleDoctrine on sourceforge.net
- Castle Doctrine on store.steampowered.com
- Der Clou! Quellcode veröffentlicht on dlh.net (in German, 13 July 2000)
- Spieleklassiker: Der Clou (1994) by Patrick Jedamzik (in German, 26 December 2006)
- The Prisoner - Game on github.com
- Rawitsch, Dan (May–June 1978). "Oregon Trail". Creative Computing. pp. 132–139. Retrieved 22 January 2015.
- On the Trail of the Oregon Trail by Jimmy Maher on filfre.net (source code: oregon1975.bas and oregon1978.bas, March 27, 2011)
- Game 90: The Wizard's Castle (1980) on crpgaddict.blogspot.de (February 25, 2013)
- The Wizard's Castle windows port by derelict (2004)
- Pit Puzzle "free distribution" (archived)
- The-Puzzle-Pits on github.com
- Tread Marks 1.7.0 now free and open source! by Rick on longbowgames.com (January 20, 2017)
- TreadMarks on github.com
- Treasures of a Slaver's Kingdom
- tag:C source available on ifdb.tads.org
- "弊社製品のムービー再生にxvid.orgのムービー展開ライブラリを使用していた件について。" [Announcement Concerning Our Company's Use of Xvid.org's Video Codec Library for Video Playback in Products] (in Japanese). Aquaplus. 2005-12-22. Archived from the original on 2006-11-26. Retrieved 2010-12-18.
- "Leaf Forced to Release Game Source Code". Anime News Network. March 1, 2006. Retrieved 2008-12-11.
- aquaplus-sources on github.com
- Tornado source code and Interplay on moodurian.com/tornado by Frankie Kam (March 11, 2016)
- tornado-dos-flightsim on github.com/tornadorebooted
- tornado-dos-flight-sim-source-code-released-on-github on assemblergames.com (2017)
- GarageGames to Release T3D as Open Source on GarageGames (Eric Preisz 2012-10-09)
- "It's here! The MIT licensed Torque 3D GitHub repo is ready!".
- Tribes 1 and 2 source code anywhere on garagegames.com (2013-01-04)
- Triplane Classic on sourceforge.net
- Triplane Classic - a side-scrolling dogfighting game on github.com
- Free game graphics: Tyrian ships and tiles Daniel Cook (2007-04-04)
- Lost garden license
- Meer, Alec (2012-10-12). "Patchy Like It's 1998: Unreal 1 Updated". rockpapershotgun.com. Retrieved 2012-12-21.
The list of fixes upon fixes are too long to mention here, but the essential purpose of v227 is to add DirectX9 and OpenAL support as well as mending everything that needs mending. Epic are aware of and permit the patch [...]
- Epic’s Tim Sweeney Says That Unreal Engine 1 May One Day Go Open Source on dsog.com by John Papadopoulos (January 19, 2015)
- Rose, Michael (2010-07-09). "Darwinia and Multiwinia Source Code Released". indiegames.com.
- The Source Code We get bored easily and once we've finished a game we want to work on something completely different. But wait, what if there's other cool stuff that could be done that we left out? If you are a programmer you can take any of our games to the next level by becoming a developer. Buy access to our hosted SVN repo and get forum access to chat about your mods with the rest of the community.
- Escape from Mount Drash on peroxide.dk "was ported from the Vic20 to PC by Telemachos. Included in the download is the sourcecode for the project. Mount Drash 0.4 Mb .zip" (2003)
- Vangers on github.com (2016)
- "Ludum Dare Entry". LudumDare. 21 September 2012. Retrieved 21 September 2012.
- letsmakeavoxelengine/ on sites.google.com
- Vox on Steam Greenlight
- Vox on github.com/AlwaysGeeky/Vox
- voxel-quest on kickstarter.com (2014)
- First Release!!! on voxelquest.com (August 03, 2016)
- vqisosmall on github.com
- Wander (1974) — a lost mainframe game is found! on April 22, 2015
- Wander (1974) release, and questions answered
- "Quarter-Two Three Forums, discussion regarding the state of Warlords Battlecry 3's source code".
- "The Gibberlings 3 Forum discussion regarding the state of Warlords Battlecry 3's source code".
- Unofficial Patches on patches-scrolls.de
- links to prominent mods and unofficial patches for WBC3 on gog.com (2014)
- license on github.com/codeka
- shutting down "The game had about 45,000 downloads in total. At its peak, there were about 2,000 7-day active players and I was making around $150 per month."
- war-worlds-is-shutting-down on war-worlds.com
- wwmmo on github.com
- Warfare Incorporated has been open sourced on warfareincorporated.com by Scott Lu (2014)
- hostile-takeover on github.com
- Warfare Incorporated now Open Source Hostile Takeover on pyra-handheld.com (2015)
- Updated GPL release readme by Jay Walker (eidos) (11 Jun 2008)
- "Capstone Source Archive". Lesbird.com. Retrieved 2015-06-21.
- world-train-royale on gamersgate.com
- world-train-royale-is-free-as-in-beer-and-speech on versus-software.com (2011)
- trainroyale on sourceforge.com
- Allen Pilgrim declared Xargon freeware and released the source code. on classicdosgames.com
- "Community Coder Program!". goldhawkinteractive. Retrieved 2015-07-09.
- "What is Xenonauts: Community Edition & how do I get it?". goldhawkinteractive.com. Retrieved 2015-07-09.
- The DUNGEON (Zork I) source on github.com/devshane/zork
- dungeon-3.2A.tar.Z (05-Oct-1994) on the Interactive Fiction Archive "Dungeon version 3.2A, 1-Oct-94; contains all the rooms and puzzles of the original MIT Zork. DEC FORTRAN source code by Robert M. Supnik; see dungn32b.zip for a port to DOS."
- Parrish, Kevin (2009-07-07). "Atari 7800 Source Code Rescued - Atari released the source code for the 7800 console and games". tomsguide.com. Retrieved 2012-01-09.
- "7800 Games & Development". atari-museum.com. 2009. Retrieved 2012-01-09.
These games were rescued from Atari ST format diskettes that were thrown out behind 1196 Borregas when Atari closed up in 1996. The Atari Museum rescued these important treasures and recovered them from the diskettes.
- Papilio-Arcade on github.com
- Art of Fighting Source Code for Neogeo (044)
- source code
- Callis, Matthew (2008-09-12). "Space Funky B.O.B. - Space Funky B.O.B. Source Code". superfamicom.org. Retrieved 2013-01-14.
This was originally posted on eludevisibility.org when I (Matthew Callis) originally bought these disks off eBay
- Original nes captain comic source-code floppy disk on gamesniped.com (September 2012)
- Original Captain Comic Source Code Floppy Disk 3.5" Color Dreams NES 11/7/89 on ebay.com
- Sega Dreamcast: Chicken Run Source Code on asssemblergames.com (2011)
- Chicken Run (2000)(Source Code) on bananabreak-rips.blogspot.de (2011/05/05)
- Smith, Quintin (2010-12-14). "Dark Engine Source Code Found In A Bag". Rock, Paper, Shotgun. Retrieved 2011-04-15.
As of this weekend, Christmas has come early for the Through the Looking Glass community. A CD’s been discovered containing the source code for the Dark Engine, aka the engine used by Thief, Thief II and System Shock 2 (not to mention Irrational and Looking Glass’ cancelled cold war spy game Deep Cover).
- Humphries, Matthew (2010-12-14). "Game engine used for Thief/System Shock 2 found with Dreamcast dev kitGames". Rock, Paper, Shotgun. Retrieved 2015-07-04.
If you asked me which is my favorite all time video game, my number one would be Thief II. So it’s with more than a little excitement that I report the source code for the Dark Engine, used to create Thief, Thief II, and System Shock 2, has been found.
- "Le Corbeau" (2012-09-25). "Thief 2 V1.19 & System Shock 2 V2.4". ttlg.com. Retrieved 2012-11-10.
This is an unofficial patch for Thief II: The Metal Age (T2) which updates the game from v1.18 to v1.19, providing improved support for modern hardware and correcting many known bugs.
- Pearson, Craig (2012-02-07). "Thief 2 Is Now On Good Old Games". Rock Paper Shotgun. Retrieved 2012-11-10.
[...]discovered that it suffers much of the same resolution and widescreen based trouble from the previous release, but this utility [Tafferpatch] fixed all my troubles [...]
- "Tafferpatcher: unofficial complete patch for Thief 2". www.ttlg.com. 2012-11-10. Retrieved 2012-11-10.
Included patches: - Patch 1.19 which eliminates all issues with modern hardware, widescreen resolutions, multi-core systems, etc.- Various mission, gamesys, model and texture fixes.[...]
- timothy (2012-08-07). "Dark Reign 2 Goes Open Source". slashdot.org. Retrieved 2013-08-13.
- "darkreign2". google code. 2011-09-01. Retrieved 2013-08-19.
- Donkey Kong source code at AtariAge.com
- Donkey Kong source code "I think it's pretty cool that this is finally released. Have fun. (Curt should find Super Pac-Man and do that one, too...)"
- DragonII on archive.org
- source-found-on-original-double-ii-dragon-dos-game on assemblergames.com (November 2010)
- Humphries, Matthew (2011-05-25). "Eve Online source code posted online, DMCA takedown quickly follows". geek.com. Retrieved 2015-11-07.
It looks as though someone has posted the source code for the space MMO Eve Online there. As you’d imagine, developer CCP isn’t too happy about this and was quick to issue the takedown request.
- ProjectX brings Forsaken on modern systems and lets you to free play at 1920 x 1080 (30.03.2013)
- ForsakenX on github.com
- license on GitHub.
- Revolt on the Xbox by Borman on Assemblergames.com (Aug 3, 2014)
- "Re-Volt v1.2 Update - Downloads". Retrieved 2013-07-21.
- Of All Things, Re-Volt Is Still Being Patched by Alex Walker on Kotaku (Oct 27, 2015)
- downloads on re-volt.io (2017)
- Ultimate_Mortal_Kombat_3_(3DO_Cancelled_Port) on lostmediawiki.com
- 3DO Ultimate Mortal Kombat 3 on assemblergames.com (Nov 15, 2009)
- code-source-mr-nutz-2 on assemblergames.com
- amiga source on gilgalad.arc-nova.org
- gamecube-killer7-source-code on assemblergames.com (October 2016)
- xray on github.com (August 2014)
- xray-16 on github.com
- S.T.A.L.K.E.R.: How The OpenGL Port is Shaping Up on boilingsteam.com (November 1, 2015)
- thug on github.com (February 2016)
- Acclaim / Iguana Entertainment Turok Source Code Silicon Graphics Indy Computer on ebay.com (February 2017)
- just_like_that_turok_source_code_is_lost_again on reddit
- Acclaim Entertainment computers recovered from Brooklyn warehouse on vogons.org
- Bailey, Kat (2014-05-15). "Jurassic Park: Trespasser remake aims to make good on long-lost promises". joystiq.com. Retrieved 2014-08-13.
The community has even managed to get hold of the original source code, which they've set to work modifying.
- Patches on trescom.org
- Sanglard, Fabien (2014-06-10). "Jurassic Park: Trespasser CG Source Code Review". fabiensanglard.net. Retrieved 2014-08-13.
- 1.07 on trescomforum.org by Lee Arbuco (2016)
- WtF Dragon (2014-11-26). "Ultima 9: The Source Code". ultima codex. Retrieved 2015-10-28.
As we continue to mark the occasion of Ultima 9’s fifteenth anniversary, I’m pleased to announced that the seemingly dormant Ultima Source Code Offline Archival Project (USCOAP) has finally borne some fruit: the Ultima Codex has added the source code for Ultima 9 to its offline archive.
- "BIG NEWS: Wing Commander I Source Code Archived!". wcnews.com. 2011-08-26. Retrieved 2013-01-14.
Thanks to an extremely kind donation from an anonymous former EA/Origin developer, the source code to the PC version of Wing Commander I is now preserved in our offline archive! Because of our agreement with Electronic Arts, we're not allowed to post recovered source code for download--but rest easy knowing that the C files that started it all are being kept safe for future reference. Our offline archive contains material that has been preserved but which can't be posted, including other source code and budget data from several of the games.
- "Wing Commander III - The Source Code". wcnews.com. 2011-09-13. Retrieved 2013-01-14.
As we celebrate Wing Commander III's first widespread retail availability since the late 1990s, we would like to mention for anyone that we have the game's source code in our offline archive. We know it's frustrating for fans, who could do amazing things with this, to read these updates... but it's also in everyone's best interests to remind EA that we have the raw material from which they could port Wing Commander III to a modern computer or console. Just let us know!
- "Wing Commander IV: Source Code". wcnews.com. 2012-04-03. Retrieved 2013-01-14.
As with Wing Commander I and Wing Commander III, we are pleased to announced that an extremely kind former EA/Origin employee has provided a copy of the Wing Commander IV source code for our preservation efforts! We can't offer it for download at this time, but it is now preserved for future use.
- GET LAMP Raw Interviews Pretty Much Up on ascii.textfiles.com by Jason Scott (3 December 2012)
- Kohler, Chris (2008-04-18). "'Infocom Drive' Turns Up Long-Lost Hitchhiker Sequel". wired.com. Retrieved 2016-01-26.
Remnants of the unreleased sequel to Infocom’s text adventure version of The Hitchhiker’s Guide to the Galaxy have been made available to the public by Waxy.org. Playable prototypes, design docs, source code and a string of e-mails between Infocom designers and management provide a fascinating look at the game’s turbulent, if aborted, development process. Among the assets included: design documents, e-mail archives, employee phone numbers, sales figures, internal meeting notes, corporate newsletters, and the source code and game files for every released and unreleased game Infocom made."
- Baio, Andy (Apr 17, 2008). "Milliways: Infocom's Unreleased Sequel to Hitchhiker's Guide to the Galaxy". waxy.org. Retrieved 2016-01-26.
From an anonymous source close to the company, I've found myself in possession of the "Infocom Drive" — a complete backup of Infocom's shared network drive from 1989.[...] Among the assets included: design documents, email archives, employee phone numbers, sales figures, internal meeting notes, corporate newsletters, and the source code and game files for every released and unreleased game Infocom made
- Andersen, John (January 27, 2011). "Where Games Go To Sleep: The Game Preservation Crisis, Part 1". Gamasutra. Archived from the original on April 22, 2013. Retrieved January 10, 2013.
The existence of decaying technology, disorganization, and poor storage could in theory put a video game to sleep permanently -- never to be played again. Troubling admissions have surfaced over the years concerning video game preservation. When questions concerning re-releases of certain game titles are brought up during interviews with developers, for example, these developers would reveal issues of game production material being lost or destroyed. Certain game titles could not see a re-release due to various issues. One story began to circulate of source code being lost altogether for a well-known RPG, preventing its re-release on a new console.
- "Bubble Bobble". Arcade History. September 11, 2012. Archived from the original on September 30, 2012. Retrieved January 10, 2013.
In 1996, Taito announced that they lost the original source code program to Bubble Bobble following a reorganization - when it came to the recent ports and sequels, they had to work from program disassembly, playing the game and (mainly) the various home computer ports.
- Barenblat, Adam (July 25, 2008). "Sega Can't Find The Source Code For Your Favorite Old School Arcade Games". Kotaku. Archived from the original on December 20, 2013. Retrieved December 1, 2013.
- Silent Hill HD was made from incomplete code on Destructoid Archived October 16, 2013, at the Wayback Machine.
- oh-my-silent-hill-hd-collections-sucked-because-konami-lost-the-source-code on gameoverviews.com (2012)
- kingdom-hearts-1-data-is-lost-square-had-to-recreate-everything-for-hd on siliconera.com (2013)
- Parrish, Kevin (July 7, 2009). "Atari 7800 Source Code Rescued - Atari released the source code for the 7800 console and games". tomsguide.com. Archived from the original on April 22, 2014. Retrieved January 9, 2012.
- "7800 Games & Development". atari-museum.com. 2009. Retrieved January 9, 2012.
These games were rescued from Atari ST format diskettes that were thrown out behind 1196 Borregas when Atari closed up in 1996. The Atari Museum rescued these important treasures and recovered them from the diskettes.[permanent dead link]
- M-HT (2011-11-06). "Albion". openpandora.org. Retrieved 2014-04-03.
- M-HT (2011-06-11). "Albion". repo.openpandora.org. Retrieved 2014-04-02.
This is a port of the game's executable for Pandora (using static recompilation/binary translation).
- M-HT (2015-03-16). "Albion". boards.openpandora.org. Retrieved 2015-04-24.
Here is a version for Windows, in case anyone is interested. Unpack it into the directory where Albion is installed - read the Readme for more information (use Albion.cmd to run the game).
- github.com/M-HT/SR on github.com
- Patterson, Blake (2011-12-26). "A Fascinating Look Under the Hood of 'Another World'". toucharcade.com. Retrieved 2013-10-14.
- Sanglard, Fabien (2011-12-23). ""Another World" Code Review". fabiensanglard.net. Retrieved 2013-01-14.
I spent two weeks reading and reverse engineering further the source code of Another World ("Out Of This World" in North America). I based my work on Gregory Montoir's "binary to C++" initial reverse engineering from the DOS executable. I was amazed to discover an elegant system based on a virtual machine interpreting bytecode in realtime and generating fullscreen vectorial cinematic in order to produce one of the best game of all time.
- Bermuda Syndrome on cyxdown.free.fr
- cyxx on github.com
- Bermuda Syndrome for OpenPandora on openhandhelds.org
- commodore-64-rem-the-lost-art-of-source-code-archeology on commodore.ninja by Paulo Garcia (Mar 6, 2016)
- Boulder Dashes ReM (2016) on csdb.dk (2016)
- Reengine & Mod (ReM) on csdb.dk
- DrCreep on github.com
- OpenFodder - Open sourced Cannon Fodder gets a big 1.0 release! on indieretronews.com
- Releases on github.com
- Diablo II Running on Open Pandora! on PandoraLive (22 November 2015)
- notaz (2015-11-22). "Diablo II". openpandora.org. Retrieved 2015-12-04.
This is statically recompiled Windows executable, that was recompiled to ARM and bundled with ARM version of wine.
- OpenDUNE on github.com
- dunedynasty on repo.openpandora.org
- Chaos Strikes Back for Windows (and Linux, MacOS X, Pocket PC) on Dungeon Master Encyclopedia (2005-10-24)
- Walker, John (2012-03-29). "You Could Be Playing Dungeon Master Right Now". Rock, Paper, Shotgun. Retrieved 2015-08-03.
There is a version that just works, without an emulator, and it’s free. [...] A madman by the name of Paul Stevens spent six months, eight hours a day, writing 120,000 lines of what he calls “pseudo-assembly language” to rebuild it in C++. And then released the game and source code for free. Can he do that? I’ve decided that yes, he can, which legitimises my promoting it to you.
- Back to the source: ReDMCSB by Christophe Fontanel (18-Jan-2014)
- Is it possible to reverse engineer software without its source code? on quora.com by Doug Bell "lead developer of "Dungeon Master": Yes. Here's an example."
- Johnson, Phil (2014-05-06). "Digging up E.T.'s source code". ITworld.
The code, written in assembly language for the MOS Technology 6502 8-bit processor, has been around for a while, having been reconstructed by Dennis Debro in 2006.
- E.T. the Extra-Terrestrial(1982) Atari 2600 Source Code on pastebin.com
- Original Game Disassemblies on bjars.com
- "Fixing E.T. The Extra-Terrestrial for the Atari 2600". Neocomputer. Retrieved April 6, 2013.
- "NewKind". Christian Pinder. Archived from the original on 2008-08-09. Retrieved 2008-08-09.
- Martin, Matt (2014-09-17). "Classic space sim Elite goes free this weekend". vg247. Retrieved 2015-11-06.
"A superior remake of the original space trading game Elite will be released for free this weekend, 30 years after the original game launched"
- Bell, Ian (2014-09-20). "Elite 30th Anniversary". elitehomepage.org. Archived from the original on September 2, 2015.
"Today, 20th September 2014 is the 30th anniversary of the day the world first experienced Elite, the 3D space trading and combat game written by Ian Bell and David Braben in conjunction with Acornsoft. From that beginning on the BBC Micro and Acorn Electron, the game went on to be released for most home computers of the time. Celebrate by playing Elite again, for free. Thanks to Matt Goldbolt. the original BBC Micro version now runs direct in the Google Chrome browser if you click here. Or for Windows PCs, download Christian Pinder's Elite: The New Kind by clicking here."
- newkind on GitHub.
- "colditz escape!". sites.google.com. 2010. Retrieved 2016-01-14.
- colditz-escape on github.com
- "Exile disassembly". level7.org.uk. 2012. Retrieved 2013-01-14.
Published by Superior Software in 1988, Exile is widely regarded as the most technically advanced game released for the BBC Micro. Featuring an enormous procedurally generated landscape, a complete physics engine and a host of game elements to interact with, it remains unsurpassed in pushing the capabilities of the system to their limits.
- Exile on thunderpeel2001.com/exile "Email from Peter Irvin (creator of Exile): Yes I've recently decided to allow old versions of Exile to be downloaded for emulation under certain conditions: [...]"
- Paul Robson's SDL Games "Football Manager - A remake of the (in)famous Sinclair Spectrum Football Manager game, complete with stick-man graphics. This is reverse engineered, so it should play identically. Finished. fm-0.99.tar.gz" (May 2004)
- GP2X version at GP2X Archive (archived)
- GLFrontier Project Page!!!1 on noflag.org.uk "This WAS the Atari ST version of the game Frontier: Elite 2 by the great man mentioned previously. It was disassembled, OS calls and hardware access removed, and originally run on a stripped down ST emulator (Hatari). Now it is compiled to C or native x86, and run much faster without 68K emulation. Most recently it has been modified to draw stuff with OpenGL at any shiny resolution with 8xAA, etc. A dandy evolution for a crappy old Atari ST game."
- News on eliteclub.co.uk "8th November 2000 - Following much discussion on the subject of open-source by the Elite community, we have decided to make some alterations to our previous plans for the Elite Club - we are going to relax some of the restrictions we were intending to put on the distribution of the source code. The source code will now be distributable more freely, under a licence agreement similar to the GPL (GNU Public Licence)."
- Welcome Commander,to the AmigaFFE Project "after I have seen the announcement of a release of the Sources of Frontier Elite II and Frontier First Encounters on the Eliteclub-Website http://www.eliteclub.co.uk,I was very happy with it. Now it is 2001 (around 2 years since the announcement) and they still haven't released it"
- Jordan, John (2009-12-01). "JJFFE Central". jaj22.org.uk. Archived from the original on 2011-03-03. Retrieved 2015-11-06.
What is JJFFE? JJFFE is set of recompiled replacement executables for the 1995 Frontier Developments game Frontier: First Encounters. There are currently versions that run under Windows 95/98/ME, Windows 2000, Windows XP, Windows NT4, OS/2, Linux and Mac. As well as running on many more operating systems than the original, JJFFE also includes minor improvements and bugfixes.
- FFE_D3D on alioth.net
- halflife on github.com/ValveSoftware
- xash3d-engine on indiedb.com
- halflife on github.com/ptitSeb
- Heart of the Alien Redux on sourceforge.net
- Twin-e on sourceforge
- Twine-e on GitHub.
- 'Alone in the Dark 1' recode released - v0.1 on vogons.org
- MetroidMMC3 on github.com
- Metroid Source Code on metroid-database.com
- The Mod Coder Pack on modcoderpack.com
- outrun-decompilation-project (2009-08-01)
- Cannonball-manual on github.com
- cannonball_ptitseb on repo.openpandora.org
- pokered on github.com
- pokecrystal on github.com
- fabricating-hardware-from-the-original-arcade-pong-schematics on hackaday.com
- Pong on atarihq.com
- Pong Reborn
- "OpenRCT2 project - Open-Source adaption of RollerCoaster Tycoon 2, gets a beta release". indieretronews.com. 2015-09-08. Retrieved 2015-11-15.
I'm sure many of you remember the awesome game that is RollerCoaster Tycoon 2; a game by Chris Sawyer and published by Infograms in which you manage your very own theme park, with all its rides, shops, guests and economic fortune. Well that same game is now being given a much needed adjustment with the latest release of OpenRCT2 Project. An open source development which improves the game even further with new features, original bug fixes, raised game limits and much more! [...] Development started on April 2nd 2014 by Ted 'IntelOrca' John and thanks to numerous contributions from others
- "OpenRCT2". GitHub. Retrieved 2015-11-15.
- Powerslave EX released, powerslaveex.wordpress.com.
- Ruhland, Perry (May 4, 2015). "An Interview With the Man Rebuilding Powerslave". TechRaptor. Retrieved November 18, 2015.
- Turok: The Dinosaur Hunter PC remake to resume development this year on videogamer.com by James Orry "The news comes from PC dev Samuel "Kaiser" Villarreal, who leaked the news speaking to Tech Raptor. Kaiser is currently remaking '96 shooter PowerSlave, and was asked about giving the same treatment to Turok." (8th May, 2015)
- Source code to my hobby project, PowerslaveEX, has been made public! by SVKaiser on twitter.com
- PowerslaveEX on github.com
- "VOGONS • View topic - Snipes ported to C/C++ with 100% logic compatibility and replay recording". www.vogons.org. Retrieved 2016-08-25.
- Snipes on github.com
- superbomberman on GitHub by Lior Halphon
- A COMPREHENSIVE SUPER MARIO BROS. DISASSEMBLY on GitHub by doppelganger
- spaceace iigs on GitHub.
- Space-Ace on whatisthe2gs.apple2.org.za
- man-makes-star-castle-for-atari-2600-30-years-after-atari-said-it-couldnt-be-done on eurogamer
- star-castle-2600-story on starcastle2600.blogspot.com
- atari-2600-star-castle on kickstarter.com (2012)
- Release: Starcraft on pyra-handheld.com "As you can see it doesn't look much different from x86 disassembly, the only difference is that you can compile it for other 32bit archs (there is no way it would work on 64bit.."
- Steinlechner, Peter (2014-03-10). "Starcraft für ARM-Handheld kompiliert" (in German). golem.de. Retrieved 2014-03-25.
- notaz (2014-03-04). "StarCraft". openpandora.org. Retrieved 2014-03-26.
- Sanglard, Fabien (2014-01-22). "Reverse Engineering Strike Commander". Retrieved 2014-01-23.
Most people assume the source codes and gold versions of all finished games were stored in a Vault somewhere at EA. But after getting in touch with people at Wing Commander CIC, it appeared that all the source code was lost when the company closed.[...] On his first day one developer managed to delete the full 900MB of Strike Commander source tree.
- libRealSpace on GitHub
- S3DNA DOS Source Code Reconstructed on 28. August
- Re: Restoration of a few games' EXEs versions
- 2010-01-26: Syndicate Wars Port - a reverse-engineering tale
- About "Syndicate Wars Port is a port of the 1996 DOS game Syndicate Wars to modern operating systems. In particular, it runs on GNU, Mac OS and Windows, but it should also work on any system supported by the SDL library on the i386 architecture."
- The First Video Game? Schematics
- Resurrecting Tennis for Two, a video game from 1958 by Windell Oskay on evilmadscientist.com (July 16, 2008)
- The-Great-Escape on github.com/dpt
- The Great Escape slides by David Thomas
- TheLastNinja on github.com
- ReC98 on github.com
- "OpenTTD 0.1.1". SourceForge page about OpenTTD. Retrieved 2009-12-11.
- "TTDPatch origin". Transport Tycoon Forums. Retrieved 2009-12-11.
- Oric Game remakes on jotd.pagesperso-orange.fr "I have written a set of tools to convert BASIC and asm code to C and assemble them together. I have used them over the years to convert a few games. Some conversions get some enhancements, some not."
- HouseOfDeath_dev.zip on jotd.pagesperso-orange.fr
- L'Aigle d'Or on pyra-handheld.com by ptitSeb (Dec 20, 2014)
|Wikimedia Commons has media related to Free video games.|
- Open source games at DMOZ
- Game Source Code Collection at the Internet Archive
- Liberated Games, specialized on open sourced computer games
- Open Source Game Clones, specialized in open source variants of commercial games
- Video Game Source Code Repository, archive of historical video game source code