List of open-source video games
This is a selected list of open-source video games. Open-source video games are games assembled from and are themselves open-source software, including public domain games with published source code. This list includes games in which the game engine is open-source but the game content (media and levels, for example) may be under a different license.
Open engine and free content
The games in this table are developed under an open-source license with free content which allows reusage, modification and commercial redistribution of the whole game. Licenses can be a Public Domain, GPL license, BSD license, Creative Commons License, zlib license, MIT license, Artistic license and more (see the comparison of Free and open-source software and the Comparison of free and open-source software licenses).
|Title||First Release||Last Update||Genre||Engine License||Content License||Dimensions||Additional Information|
|0 A.D.||2009||2015||RTS||GPLv2||CC BY-SA||3D||Historical, cross-platform RTS, using an original engine named Pyrogenesis. Game source-code released July 10, 2009.|
|2048||2014||2014||Puzzle||MIT||MIT||2D||A sliding block puzzle game.|
|Armagetron Advanced||2001||2015||Racing||GPL||GPL||3D||A multiplayer, 3D Tron lightcycle racing game.|
|AstroMenace||2007||2013||Arcade||GPL||GPL, CC BY-SA||3D||A top-scrolling space shooter.|
|Battle for Wesnoth||2005||2015||TBТ||GPL||GPL||2D||Turn-based tactical strategy game with RPG elements. Includes single-player campaign and skirmish modes as well as multiplayer.|
|Biniax||2005||2012||Puzzle||Zlib License||Zlib License||2D||?|
|Blades of Exile||1997||2011||RPG||GPL||GPL||2D||Was originally a commercial product of Spiderweb Software.|
|Blob Wars||2003||2009||Platformer, Action-adventure||GPL||GPL, CC BY-SA, other open source||2D, 3D||?|
|Bos Wars||2004||2013||RTS||GPL||GPL||Isometric 2D||2D RTS running on a modified version of the Stratagus engine.|
|Cataclysm: Dark Days Ahead||2013||2014||RPG/Roguelike||CC BY-SA||CC BY-SA||?||A post-apocalyptic, survival roguelike with an open-ended gameplay. Had a successful crowdfunding campaign on kickstarter.com in 22 June 2013.|
|Chromium B.S.U.||2000||2013||Arcade||Artistic||Artistic||?||A fast paced, arcade-style, top-scrolling space shooter|
|Colossal Cave Adventure||1976||1995||Text adventure||Public domain||Public domain||Text||The original text adventure game by Crowther / Woods.|
|Crossfire||1992||2014||MMORPG||GPL||GPL||?||Crossfire originally started as a Gauntlet clone developed by Frank Tore Johansen at the University of Oslo, Norway.|
|Diamond Trust of London||2012||2012||TBS||Public Domain||Public Domain||2d||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.|
|Dungeon Crawl Stone Soup||2006||2015||Roguelike||GPL||CC0||?||An open-source fork of the 1997 game Linley's Dungeon Crawl.|
|Endgame: Singularity||2005||2011||science fiction/AI simulation game||GPL||GPL||2d||written in Python|
|Fish Fillets NG||2004||2011||Puzzle||GPL||GPL||?||Released commercially as Fish Fillets in 1998. Source released in 2002 under the GPL.|
|FlightGear||1997||2015||Flight Sim||GPL||GPL||3D||Microsoft Flight Simulator inspired clone.|
|Freeciv||1996||2015||TBS||GPL||GPL||Isometric 2D||Civilization II clone.|
|FreeCol||2003||2015||TBS||GPL||GPL||Isometric 2D||Sid Meier's Colonization clone.|
|Freedoom||1993 (2001)||2014||FPS||BSD||BSD||?||Doom content/resource clone.|
|Frozen Bubble||2002||2008||Puzzle||GPLv2||GPLv2||2D||Puzzle Bobble clone.|
|Gang Garrison 2||2008||2014||Shooter||GPL||GPL||?||A retro "demake" of Team Fortress 2.|
|Glest||2004||2008||RTS||GPL||CC BY-SA||3D||3D RTS game with two factions, A.I. and same-platform networking support. Development ceased in 2008. Two forks exist, named MegaGlest and Glest Advanced Engine.|
|Globulation 2||2008||2009||RTS||GPLv3||GPLv3||2D||Currently[when?] in open beta.|
|GLtron||2003||2003||Racing||GPL||GPL||3D||Based on the light cycle portion of the film Tron.|
|GNOME Games||1998||2010||Various||GPL||GPL||?||A collection of games accompanying the rest of the GNOME desktop environment.|
|GNU FreeDink||1997||2012||RPG||GPLv3||zlib, other free licenses||?||Port from the Dink Smallwood game with free sound replacements|
|Hedgewars||2007||2015||Artillery game||GPLv2||GPLv2||2D||Worms clone.|
|KDEGames||1997 1998||2009||Various*||GPLv2||GPLv2||*Collection of games provided with the official release of KDE.|
|Kiki the nano bot||2003||2007||Puzzle||Public domain||Public domain||?||Mixture of Sokoban and Kula World.|
|Lincity||1999||2013||City-building game||GPL||GPL||?||SimCity clone.|
|Linley's Dungeon Crawl||1997||2005||Roguelike||LGPL||LGPL||?||Roguelike game.|
|Liquid War||1995||2014||Maze games||GPL||GPL||2D||2D game in which you control particles and move them to defeat the opposing side.|
|MegaGlest||2010||2015||RTS||GPL||CC BY-SA||3D||Cross-platform 3D RTS for up to eight players (can be A.I. controlled) on seven factions. MegaGlest is a fork of Glest.|
|MegaMek||2005||2009||TBТ||GPL||GPL||?||Simulates the Classic BattleTech board game.|
|Micropolis||1989 (as SimCity)
2008 (as Micropolis)
|2008||City-building game||GPLv3||GPLv3||?||Open-source release of SimCity. Also known as OLPC SimCity.|
|Microwar||2000||2009||Arcade||BSD||BSD||?||A 'Space Invaders' style arcade game, in the cruel world of micro-computer industry.|
|Moria||1983||1999||RPG/Roguelike||GPL||GPL||2D||A roguelike RPG based heavily on J. R. R. Tolkien's novel The Lord of the Rings.|
|NetHack||1987||2003||RPG/Roguelike||Nethack GPL||Nethack GPL||Text||A single player dungeon exploration game.|
|Netrek||1988||2011||Shoot 'em up||MIT||MIT||2D||Successor to 1986's Xtrek, Netrek was first played in 1988. It was the third Internet game, the first Internet team game, and as of 2011 is the oldest Internet game still actively played.|
|Nexuiz||2005||2009||FPS||GPL||GPL||3D||Forked into Xonotic following a commercial licensing agreement by a minority of the development team.|
|Oolite||2006||2015||Space Sim||GPLv2||GPLv2||3D||Elite Clone|
|OpenArena||2005||2012||FPS||GPLv2||GPLv2||3D||Quake III Clone|
|OpenCity||2003||2008||City-building game||GPL||GPL||3D||SimCity Clone.|
|OpenClonk||2010||2015||Action, RTS, Platform||ISC||CC BY||2D||Successor of the Clonk shareware series|
|Pioneer||2006||2015||Space sim||GPLv3||CC BY-SA||3D||Inspired by Frontier: Elite 2|
|PySol||2001||2009||Card games, Patience||GPLv3||Public domain and GPLv3||2D||?|
|Red Eclipse||2011||2015||FPS||zlib||CC BY-SA / CC BY ||3D||Cube 2: Sauerbraten engine.|
|Rigs of Rods||2007||2015||Vehicle Sim||GPLv3||GPLv3||3D||Rigs of Rods was initially created as an off-road truck simulator, but has developed into a versatile physics sandbox.|
|Rocks'n'Diamonds||1995||2013||Puzzle||GPLv2||GPLv2||2D||A scrolling tile-based computer puzzle game that can be described as a combined Boulder Dash, Supaplex, Emerald Mine, and Sokoban clone.|
|Ryzom||2004||2015||MMORPG||AGPL||CC BY-SA||3D||All textures and effects, 3D models, animations, characters and clothing (no music or sounds) are under CC BY-SA.|
|Scorched 3D||2001||2012||Artillery game||GPL||GPL||3D||Clone of Scorched Earth (video game)|
|Secret Maryo Chronicles||2003||2009||Platformer||GPLv3||GPLv3||2D||2D platformer inspired by the Super Mario series.|
|Simutrans||1997||2014||Business Sim||Artistic||Artistic||2D||Similar to Transport Tycoon and its open-source clone, OpenTTD. The player must build a profitable transportation system.|
|Sintel The Game||2012||2012||RPG||GPL||CC BY, GPL||3D||A game based on the Blender Foundation movie, Sintel.|
|Smash Battle||2008||2009||Platformer||GPLv3||CC||2D||Smash Battle is a Retro 8-bit style platform shooter, inspired by the battle mini-game from Super Mario Bros. 3.|
|Sopwith||1984||2014||Shoot 'em up||GPL||GPL||?||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.|
|Space Station 13||2003||2013||RPG||GPLv3+||CC BY-SA||2D||A multiplayer, 2D, sprite and tile based role playing game. Written in BYOND.|
|Speed Dreams||2010||2012||Sim racing||GPLv2+||FAL||?||Forked from TORCS in late 2008.|
|StepMania||2005(?)||2015||Rhythm game||MIT||MIT||2D and 3D||A DDR clone, the player must hit buttons or keys in time with the music.|
|SuperTux||2003||2013||Platformer||GPL||GPL||2D||2D platformer inspired by the Super Mario series.|
|SuperTuxKart||2006||2015||Racing||GPL||GPL||3D||Arcade racing game similar to Mario Kart.|
|Teeworlds||2007||2014||Platformer||zlib||CC BY-SA 3.0 (except font)||2D||2D side-scrolling shooter.|
|Tenés Empanadas Graciela||1996||2007||TBS||GPLv2||GPLv2||?||Based on the boardgame Risk.|
|The Castle Doctrine||2014||2014||MMO||Public Domain||Public Domain||2d||A game by Jason Rohrer, developed on a Sourceforge repository and sold on Steam for 14.99$.|
|Tremulous||2006||2009||FPS||GPL||CC BY-SA||3D||Alien VS human base building, defending, and attacking opposite team.|
|TripleA||2002||2013||TBS||GPL||GPL||2D||A turn based strategy game inspired by Axis & Allies and board game engine. Development is ongoing.|
|Tux, of Math Command||2001||2011||Educational game||GPL||GPL||2D||?|
|UFO: Alien Invasion||2006||2014||TBТ||GPL||GPL, CC BY-SA||3D||Inspired by the XCOM-series, but with 3D-combats on surface of the earth.|
|UltraStar Deluxe||2007||2010||Music||GPL||GPL, CC||2D||SingStar clone.|
|Unknown Horizons||2008||2014||City-building game||GPL||GPL, CC, OFL||Isometric 2D||Genre-mix of city-building game and real-time strategy game, inspired by the Anno series.|
|Unvanquished||2012||2015||FPS||GPL||CC BY-SA||3D||Team-based first person shooter with strong RTS elements, derived from the Tremulous project. - Homepage|
|Vega Strike||2008||2012||Space Sim||GPL||GPL||3D||Elite clone and space simulator engine.|
|Warmux||2002||2010||Artillery game||GPL||GPL||2D||Worms clone.|
|Warzone 2100||1999||2014||RTS||GPLv2||CC BY-SA||3D||Post-apocalyptic, cross-platform RTS.|
|Widelands||2002||2014||RTS||GPL||GPL||?||Widelands is a RTS clone of The Settlers II.|
|WorldForge||1998||2014||MMORPG||GPL||GPL||3D||An open-source framework for massively multiplayer online role-playing games.|
|Xconq||1987||2005||TBS||GPL||GPL||?||4X strategy game engine.|
|XEvil||1994||2003||Platformer||GPL||2D||Fast paced side-scrolling action game.|
|X-Moto||2005||2012||Platformer||GPL||GPL||2D||Elasto Mania Clone.|
|Xonotic||2010||2015||FPS||GPL||GPL||3D||A fork and direct successor of the game Nexuiz.|
|XPilot||1992||2010||Arcade||GPL||GPL||2D||A multiplayer Asteroids-like game.|
|Yo Frankie!||2008||2009||Action-adventure||GPL, LGPL||CC BY 3.0||3D||?|
Open-source games with own but non-free content
While the games in this table are developed under an open-source license, the reusage and modification of only the code is permitted. As some of the games' content (sound, graphics, video and other artwork) is proprietary or restricted in usage, the whole games are non-free and restricted in re-usage (depending on license). The motivation of a developer to keep the own content non-free while he opens the source code is most often the protection of a game as sellable commercial product. Sometimes the motivation is the prevention of a commercialization of free product in future, e.g. when distributed under a CC NC license.
|Title||First Release||Last Update||Genre||Engine License||Content License||Dimensions||Additional Information|
|AssaultCube||2006||2010||FPS||zlib||CC BY-NC-SA||3D||Based on Cube. A lightweight online FPS (45-50 MB package), with a built-in map maker and capable of being played with a 56k connection.|
|C-Dogs SDL||2002||2013||Run and gun||GPL||Freeware||2D||Overhead run and gun, with hotseat co-operative and deathmatch play for up to four players.|
|C-evo||1999||2008||TBТ, 4X||Public domain||Proprietary||?||Inspired by Sid Meier's Civilization|
|Cart Life||2011||2014||Simulation||CART LIFE'S FREE LICENSE (Permissive license)||CART LIFE'S FREE LICENSE (Permissive license)/Freeware||2d||In March 2014 the source code and game was made available by Richard Hofmeier for free online, saying he was finished supporting the game. Winner of the IGF 2013 award.|
|CodeRED: Alien Arena||2004||2011||FPS||GPL||Proprietary||?||Based on ID Software open-source engine.|
|Cube||2002||2005||FPS||zlib||Proprietary||3D||Deathmatch style multiplayer gameplay with map editing.|
|Cube 2: Sauerbraten||2004||2013||FPS||zlib||Various non-free and some free licenses||3D||Deathmatch style multiplayer gameplay with map editing.|
|Frets on Fire||2006||2008||Music||GPL||GPL, Proprietary||3D||Guitar Hero clone.|
|Frogatto & Friends||2010||2011||Platformer||GPL||Proprietary||?||Initially for Windows, Linux, and Mac; hold and toss enemies, swim, talk; scripting language included.|
|Green Mahjong||2014 ||2014||Puzzle||GPLv3||CC BY-NC-SA||2D||Solitaire Mahjong|
|H-Craft Championship||2007||2015||Racing||zlib||Free for personal use||3D||Sci-Fi Racer for Linux, Windows and Android which is using the Irrlicht engine.|
|Katawa Shoujo||2012||2012||Visual Novel||MIT license (most of game and engine beside some scripts)||CC BY-NC-ND||2D||A visual novel.|
|Kroz series||1987||2009||Maze||GPL||Freeware||?||Game source released on March 20, 2009.|
|Lugaru||2005||2010||Action Third Person||GPL||Proprietary||3D||A game where the player is a anthropomorphic rabbit who seeks revenge when a group of enemy rabbits kill their family.|
|OpenTTD||2005||2015||Business Sim||GPLv2||GPLv2, CC Sampling Plus||2D||An open-source clone of 'Transport Tycoon Deluxe'|
|PlaneShift||2001||2015||MMORPG||GPL||Proprietary||?||Free to play MMORPG.|
|Steel Storm: Episode I||2010||2010||Action||GPLv2||CC BY-NC-SA 3.0||?||Based on DarkPlaces. An indie top-down arcade shooter with single-player, deathmatch, and co-op.|
|Smokin' Guns||2009||2012||FPS||GPLv2||Proprietary||3D||Western-themed first-person shooter using the ioquake3 engine.|
|Tales of Maj'Eyal||2012||2014||RPG/Roguelike||GPLv3||GPLv3+Proprietary||2D||?|
|The Dark Mod||2009||2013||Stealth game||GPLv3+||CC BY-NC-SA||3D||First person stealth game in the style of the Thief (series) games ( 1 and 2 ) using a modified Id Tech 4 engine|
|The Last Eichhof||1993||1993||Shoot-'em-up||"Do whatever your want" license (Public Domain)||Freeware||2D||Shoot-'em-up game released for MS-DOS in 1993 by Swiss company Alpha Helix. Source code released 1995.|
|TORCS||1997||2013||Racing||GPL||Free Art License / Proprietary||3D||Some car models are non-free, but there is a DFSG-compliant version which doesn't include them.|
|Urban Terror||2000||2011||FPS||GPL||Proprietary||3D||Multiplayer tactical shooter based on the id tech 3 engine.|
|Vdrift||2005||2012||Racing||GPL||GPL and proprietary||3D||Some datas are non-free, for example the "SV" car model, under a CC BY-NC-SA license.|
|Warsow||2005||2012||FPS||GPL||Proprietary||3D||Based on Qfusion, a Quake II modification.|
|World of Padman||2007||2008||FPS||GPL||Proprietary||?||Originally a Quake 3 modification. Became stand-alone in 2007, now runs on ioquake3.|
|Zero-K||2010||2015||RTS||GPL||CC BY-NC-ND||3D||Zero-K is a multi-platform real time strategy game inspired by Total Annihilation, powered by the Spring game engine.|
Open-source remakes with non-free content from the proprietary original
The Video game remakes in this table were developed under an open-source license which allows usually the reusage, modifications and commercial redistribution of the code. The required game content (artwork, data etc.) is taken from a proprietary and non-opened commercial game, so that the whole game is non-free. See also the Game engine recreation page and the List of Engines for ScummVM.
|Title||First Release||Last Update||Genre||Engine License||Content License||
|Exult||1992||2012||RPG||GPL||Proprietary||2D||Engine remake of Ultima VII.|
|REminiscence||1992||2011||Platform game||GPL||Proprietary||2D||Engine remake of Flashback_(1992_video_game).|
Source available games
For video games in this table the source code is available but they are neither open-source software according to the OSI definition nor free software (see software with source available). These games are released under a license with limited rights for the user, for example only the rights to read and modify the game's source for personal or educational purposes but no reusage rights beside the game's original context are granted. Typical licenses are the creative commons "non-commercial" licenses (e.g. CC BY-NC-SA), MAME like licenses or several shared source licenses.
|Title||First Release||Last Update||Genre||Engine License||Content License||
|Jump 'n Bump||1998||1999||Deathmatch Platformer||Emailware||Emailware||?||1998 freeware MS-DOS platform video game, written in C and Assembly language by Brainchild Design. The source code was released in 1999, then ported to a number of other operating systems and platforms via SDL.|
|Mari0||2012||2012 (stable), 2014 (unstable)||Platformer||CC BY-NC-SA||CC BY-NC-SA||2D||Remake of Super Mario Bros with elements from Portal.|
|Racer||2003||2011 (Proprietary)||Sim Racing||Proprietary||Proprietary/Freeware||?||Only source code of 0.5 version is available, all other releases are closed source.|
|Spelunky Classic||2008||2009||Platformer||non-commercial license||Freeware||2d||The source code of the 2008's Windows freeware version was published under a software license permitting noncommercial distribution and modification on December 25, 2009. Based on this source code the game community created a community patch which added support for Mac OS X. For the later remade 2012 release the source code wasn't provided, only for the 2008 "Classic" Spelunky version.|
|Visual Pinball||2000||2011||Pinball simulation editor and game||MAME like license||diverse||?||Many free custom tables and recreations of original machines available. The program is also able to operate with Visual PinMAME|
Proprietary developed games, later opened under varying licenses
For games which were originally developed proprietary as commercial closed source product, see also Category:Commercial video games with freely available source code.
- List of open-source game engines
- List of commercial video games with later released source code
- List of commercial video games released as freeware
- List of freeware games
- Game engine recreation
- The Linux Game Tome
- 0 A.D. Open-source release
- Cataclysm: Dark Days Ahead - Dedicated Developer
- "Chromium B.S.U. About Page". 2008-06-20. Retrieved 2010-07-13.
- Jerz, D.G. "Colossal Cave Adventure". Seton Hill University. Retrieved 2007-09-07.
- Re: CF: the beginning of crossfire
- Jason Rohrer (2011-10-17). "DiamondTrust/ci/default/tree". SourceForge. Retrieved 2013-05-22.
- "Savannah Git Hosting - freedoom.git/blob - COPYING". Git.savannah.gnu.org. Retrieved 2009-04-04.
- The source code is available since September 1997.
- was first released on 12 July 1998,
- micropolis license
- 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.
- "free-moria". Retrieved 2009-04-04.
- PySol Releases on Freshmeat.net
- "The gameplay was originally inspired by the fantastic Mario Bros but has now changed overtime."
- 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.
- CastleDoctrine on sourceforge.net
- Castle Doctrine on store.steampowered.com
- [tremulous] View of /trunk/COPYING
-  The sounds are licensed under the CC BY-NC-SA license. Shockbolt's graphics are licensed under a non-free license.
- Petitte, Omri (20 March 2014). "Cart Life exits Steam, goes open source". PC Gamer. Retrieved 21 March 2014.
- cartlife_opensores.zip on the author's dropbox
- IGF 2013 winners led by Cart Life and FTL: Faster Than Light
- "[alienarena] Log of /trunk/docs/license.txt". Svn.icculus.org. Retrieved 2010-07-13.
- Developer Info Source Code and License: [...] Our code is open-source, our content isn’t.
-  "For the most part H-Craft Championship sources are released under the zlib-license."
-  You are not allowed to modify or distribute the media files or use them in your own games. But you can still download the media files and they are free for personal use.
- "Steel Storm Episode I". blendernation.com.
- STEEL STORM EPISODE 1 LIMITED USER SOFTWARE LICENSE AGREEMENT "Steel Storm Episode I EULA". steel-storm.com. Retrieved 2013-08-10.
For the purpose of this Agreement, the Art Assets include pk3 archive inside of "steelstorm/gamedata/" folder that contain two-dimensional and three-dimensional works of graphic art, photographs, prints and art reproductions, maps, charts, diagrams, models, and technical drawings, sound effects and musical arrangements, documentation and tutorial videos, and are licensed under Attribution-NonCommercial-ShareAlike 3.0 Unported license. The Engine, which includes Windows, Linux and Mac binaries, and the Engine's source code, are licensed under GNU GPL v2 license.
- In the source : "All the tiles of the "shockbolt" tileset, located in all the "gfx/shockbolt" and "gfx/lore" folders are granted to use with the Tales of Maj'Eyal game only."
- beersrc.zip - readme "Do whatever your want" license
- [zero-k] View of /trunk/mods/zk/sounds/music/license.txt
- Prophet. (2002-03-28). "GameSpyDaily - Exult Interview". Archived from the original on 2002-04-02. Retrieved 2008-05-29.
- Montoir. (2011-03-11). "REminiscence". Archived from the original on 2015-08-01. Retrieved 2015-08-13.
- Jump 'n Bump readme.txt JUMP 'N BUMP by Brainchild Design in 1998 Jump 'n Bump is e-mailware. That means you're supposed to send us an e-mail. Write for example where you're from and what you thought about this game. If you do that, you will greatly encourage us to make more games for you!
- Spelunky® User License v1.1b
- Sarkar, Samit (2012-10-12). "Spelunky unofficially patched with Mac OS X support". polygon.com. Retrieved 2014-08-07.
Spelunky, Mossmouth's renowned roguelike platformer, is now playable on Mac OS X, thanks to an unofficial patch from the game's community.
- "Spelunky v1.3 (and Source) - Now for Mac OS X and Windows". 2012-09-12. Retrieved 2012-10-05.
|Wikimedia Commons has media related to Free video games.|