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 (most often) 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||Additional Information|
|0 A.D.||2010||2013||RTS||GPLv2||CC-BY-SA||Historical, cross-platform RTS, using an original engine named Pyrogenesis. Game source-code released July 10, 2009.|
|Advanced Strategic Command||1999||2010||TBТ||GPL||GPL||Turn-based tactical war game, clone of Battle Isle and Nectaris.|
|Ardentryst||2009||2009||2D side-scrolling||GPL||GPL||An action/RPG side-scoller focused not just on fighting, but on story and character development. Strategy as well as reflexes will be needed to overcome the game. The game is set in another world.|
|Adventure||1976||Text adventure||Public domain||Public domain||The original text adventure game by Crowther / Woods.|
|Ancient Beast||2012||2013||TBТ||AGPL||CC-BY-SA||Turn based tactical strategy browser game played against other people. Inspired by HoMM3.|
|Armagetron Advanced||2001||2011||Racing||GPL||GPL||A multiplayer, 3D Tron lightcycle racing game.|
|AstroMenace||2007||2012||Arcade||GPL||GPL||A top-scrolling space shooter.|
|Battle for Wesnoth||2005||2013||TBТ||GPL||GPL||Turn-based tactical strategy game with RPG elements. Includes single-player campaign and skirmish modes as well as multiplayer.|
|Battle City||2003||2013||Vehicular combat game||GPL||GPL||An online multiplayer game starting by either building a city or applying for a job in a city built by someone else. The objective is to defend the city meanwhile attempting to destroy the enemy cities. Game source released on December 12, 2003. Programmed in C/C++ using DirectX.|
|Beyond the Titanic||1986||Text adventure||GPL||GPL||Game source released on March 20, 2009.|
|Biniax||2005||2012||Puzzle||Zlib License||Zlib License|
|Blades of Exile||1997||2011||RPG||GPL||GPL||Was originally a commercial product of Spiderweb Software.|
|Blob Wars: Blob And Conquer||2008||2009||Action-adventure||GPLv2||GPLv2, cc-by-sa, other open source||3D sequel to Blob Wars: Metal Blob Solid.|
|Blob Wars: Metal Blob Solid||2003||2009||Platformer||GPL||GPL|
|Bombermaaan||2007||2010||Action||GPL||GPL||clone of bomberman.|
|Bos Wars||2004||2010||RTS||GPL||GPL||2D RTS running on a modified version of the Stratagus engine.|
|British Bingo||2011||2012||Card||GPL||GPL||Uses 9x3 boards.|
|Chaotic Rage||2010||2013||TPS||GPLv2||GPLv2||Originally a 2D top-view shooter, now 3D using OpenGL.|
|Chocolate Doom||2005||2012||FPS||GPL||GPL||Chocolate Doom is a source port of Doom that is designed to behave as closely as possible to the original DOS executable|
|Crimson Fields||2006||2009||TBТ||GPL||GPL||Tactical war game in the tradition of Battle Isle.|
|Chromium B.S.U.||2000||2010||Arcade||Artistic||Artistic||A fast paced, arcade-style, top-scrolling space shooter|
|Crossfire||1992||2012||MMORPG||GPL||GPL||Crossfire originally started as a Gauntlet clone developed by Frank Tore Johansen at the University of Oslo, Norway.|
|Doolfy's Brain Surgery||2001||2011||RPG||GPL||GPL||A surgery based photography game.|
|Dungeon Crawl Stone Soup||2006||2012||Roguelike||GPL||CC0||An open-source fork of the 1997 game Linley's Dungeon Crawl.|
|Eat The Whistle||1998||2008||Simulation||GPLv2||GPLv2||A football simulation game. Released under the GPL in 2002.|
|Fish Fillets NG||2004||2010||Puzzle||GPL||GPL||Released commercially as Fish Fillets in 1998. Source released in 2002 under the GPL.|
|FLARE||2010||2013||Action RPG||GPL||GPL and CC-BY-SA 3.0||Hack and slash inspired by Diablo.|
|FlightGear||1997||2012||Flight Sim||GPL||GPL||Microsoft Flight Simulator inspired clone.|
|Freeciv||1996||2013||TBS||GPL||GPL||Civilization II clone.|
|FreeCol||2003||2013||TBS||GPL||GPL||Sid Meier's Colonization clone.|
|FreeDoom||1993 (2001)||2011||FPS||BSD||BSD||Doom content/resource clone.|
1. FreedroidRPG - FreedroidRPG is an isometric role playing game.
2. FreedroidClassic - FreedroidClassic is a clone of the game "Paradroid" which was released on Commodore 64 in 1985.
|FreeOrion||2004||2012||TBТ||GPL||GPL||Master of Orion Clone. Community-developed 4X turn-based galactic empire strategy game with interactive 3D combat.|
|Frets on Fire||2006||2008||Music||GPL||GPL||Guitar Hero clone.|
|Frets on Fire X||2008||2009||Music||GPLv2||GPLv2||Frets on Fire fork.|
|Frozen Bubble||2002||2008||Puzzle||GPLv2||GPLv2||Puzzle Bobble clone.|
|Gang Garrison 2||2008||2010||Shooter||GPL||GPL||A retro "demake" of Team Fortress 2.|
|Glest||2004||2008||RTS||GPL||CC-BY-SA||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||Currently[when?] in open beta.|
|GLtron||2003||2003||Racing||GPL||GPL||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.|
|Gunroar||FPS||Simplified BSD||Simplified BSD||A futuristic vertical shooter.|
|Gusanos||2004||2005||Shoot 'em up||GPL||GPL||Clone of Liero.|
|Hedgewars||2007||2011||Artillery game||GPLv2||GPLv2||Worms clone.|
|Iter Vehemens ad Necem||2001||2005||roguelike dungeon crawler||GPLv2||GPLv2||One of the game's specialties is the body parts system: the player can lose and regain limbs which have individual health points and strength.|
|KDEGames||—||2009||Various*||GPLv2||GPLv2||*Collection of games provided with the official release of KDE.|
|Kernel Panic||RTS||GPL||GPL||Real time strategy game powered by the Spring engine.|
|Kiki the nano bot||2003||2007||Puzzle||Public domain||Public domain||Mixture of Sokoban and Kula World.|
|Kobo Deluxe||1995||2007||Shoot'em up||GPL||GPL||An enhanced version of the scrolling game XKobo.|
|Kroz||1987||Maze||GPL||GPL||Game source released on March 20, 2009.|
|Lincity||1999||2004||Business Sim||GPL||GPL||SimCity clone.|
|LinCity-NG||2005||2009||Business Sim||GPL||GPL||Lincity fork.|
|Linley's Dungeon Crawl||1997||2005||Roguelike||LGPL||LGPL||Roguelike game.|
|Liquid War||1995||2008||Maze games||GPL||GPL||2D game in which you control particles and move them to defeat the opposing side.|
|M.A.X.R. (Mechanized Assault and eXploration Reloaded)||2007||2011||TBS||GPL||GPL||Remake of M.A.X.|
|MegaGlest||2010||2012||RTS||GPL||CC-BY-SA||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.|
|Minetest||2010||2013||First-person, sandbox||LGPL||LGPL||An infinite-world block sandbox game and a game engine, inspired by InfiniMiner, Minecraft and similar games.|
|M.U.G.E.N||fighting||A game engine (with game) that allows the creation of fighting games with little or no programming experience.|
|NetHack||1987||2003||RPG/Roguelike||Nethack GPL||Nethack GPL|
|Netrek||1988||2011||Shoot 'em up||MIT||MIT||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.|
|Neverball||2005||2009||Platformer||GPL||GPL||Also includes additional game Neverputt.|
|Nexuiz||2005||2009||FPS||GPL||GPL||Forked into Xonotic following a commercial licensing agreement by a minority of the development team.|
|Oolite||2006||2011||Space Sim||GPLv2||GPLv2||Elite Clone|
|OpenArena||2005||2012||FPS||GPLv2||GPLv2||Quake III Clone|
|OpenClonk||2010||2013||Action, RTS, Platform||ISC||CC-BY||Successor of the Clonk shareware series|
|OpenCity||2003||2008||Business Sim||GPL||GPL||SimCity Clone.|
|OpenTTD||2005||2013||Business Sim||GPLv2||GPLv2||An open-source clone of 'Transport Tycoon Deluxe'|
|Pathological||2003||2003||Puzzle||GPL||GPL||Inspired by Logical by Rainbow Arts.|
|Paku paku||2011||2011||Arcade game||Public Domain||Public Domain||Authentic Pac Man clone, uses a CGA 160x100x16 mode, released as Public domain.|
|PySol||2001||2009||Card games, Patience||GPLv3||Public domain and GPLv3|
|Red Eclipse||2011||2013||FPS||zlib||CC-BY-SA||Cube 2: Sauerbraten engine.|
|Rigs of Rods||2007||2012||Vehicle Sim||GPLv3||GPLv3|
|Tenés Empanadas Graciela||1996||TBS||GPLv2||GPLv2||Based on the boardgame Risk.|
|Thousand Parsec||2002||2009||TBS||GPL, LGPL||Framework/Engine for turn based space empire building games.|
|Ryzom||2004||2010||MMORPG||AGPL||CC-BY-SA||All textures and effects, 3D models, animations, characters and clothing (no music or sounds) are under CC-BY-SA.|
|Scorched 3D||2001||2011||Artillery game||GPL||GPL||Clone of Scorched Earth (video game)|
|Secret Maryo Chronicles||2003||2009||Platformer||GPLv3||GPLv3||2D platformer inspired by the Super Mario series.|
|Sintel The Game||2012||2012||RTS||GPL||CC-BY, GPL||A game based on the Blender Foundation movie, Sintel.|
|Simutrans||1997||2013||Business Sim||Artistic||Artistic||Similar to Transport Tycoon and its open-source clone, OpenTTD. The player must build a profitable transportation system.|
|Smash Battle||2008||2009||Platformer||GPLv3||CC||Smash Battle is a Retro 8-bit style platform shooter, inspired by the battle mini-game from Super Mario Bros. 3.|
|StepMania||2005(?)||Rhythm game||MIT||MIT||A DDR clone, the player must hit buttons or keys in time with the music.|
|Sokoban||1982||2006||Transport Puzzle||GPL||GPL||A puzzle game in which the player pushes boxes around in a room, trying to get them to specific locations.|
|Solarwolf||Arcade||LGPL||LGPL||Clone of Solar Fox for the Atari 2600. A 2-D action game where the player must collect the blocks on every level while avoiding various obstacles.|
|Sopwith||1984||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.|
|SpaceZero||2010||2012||RTS||GPLv3+||GPLv3+||A 2D Real Time Strategy space combat game.|
|Speed Dreams||2010||2012||Sim racing||GPLv2+||FAL||Forked from TORCS in late 2008.|
|Supernova||1987||Text adventure||GPL||GPL||Game source released on March 20, 2009.|
|SuperTux||2003||2007||Platformer||GPL||GPL||2D platformer inspired by the Super Mario series.|
|SuperTuxKart||2006||2012||Racing||GPL||GPL||Arcade racing game similar to Mario Kart.|
|Teeworlds||2007||2011||Platformer||zlib||zlib||2D side-scrolling shooter.|
|The Bub's Brothers||2003||2007||Platformer||MIT||MIT||Bubble Bobble clone|
|Tile World||2002||2006||Puzzle||GPL||GPL||Clone of Chip's Challenge|
|TORCS||Racing||GPL||Free Art License / Proprietary||Some car models are non-free, but there is a DFSG-compliant version which doesn't include them.|
|Tremulous||2006||FPS||GPL||CC-BY-SA||Alien VS human base building, defending, and attacking opposite team.|
|TripleA||2002||2012||TBS||GPL||GPL||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|
|UFO: Alien Invasion||2006||2012||TBТ||GPL||GPL, CC BY-SA, CC Sampling+||Inspired by the XCOM-series, but with 3D-combats on surface of the earth.|
|UltraStar Deluxe||2007||2009||Music||GPL||GPL, CC||SingStar clone.|
|Unknown Horizons||2008||2013||City-building game||GPL||GPL, CC, OFL||Genre-mix of city-building game and real-time strategy game, inspired by the Anno series.|
|Unvanquished||2012||2012||FPS||GPL||CC||Team-based first person shooter with strong RTS elements, derived from the Tremulous project.|
|Vega Strike||2008||2011||Space Sim||GPL||GPL||Elite clone and space simulator engine.|
|Vdrift||2011||Racing||GPL||GPL and proprietary||Some datas are non-free, for example the "SV" car model, under a CC-BY-NC-SA license.|
|WarMUX||2002||2010||Artillery game||GPL||GPL||Worms clone.|
|Widelands||2002||2012||RTS||GPL||GPL||Widelands is a RTS clone of The Settlers II.|
|Word Whiz||1988||Educational game||GPL||GPL||Game source released on March 20, 2009.|
|WorldForge||1998||2011||MMORPG||GPL||GPL||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||Fast paced side-scrolling action game.|
|Xonotic||2012||FPS||GPL||GPL||A fork of the Game Nexuiz.|
|XPilot||1992||Arcade||GPL||GPL||A multiplayer Asteroids-like game.|
|X-Moto||2005||2012||Platformer||GPL||GPL||Elasto Mania Clone.|
|Yo Frankie!||2008||Action-adventure||GPL/LGPL||Creative Commons|
|Zero-K||2010||2013||RTS||GPL||Zero-K is a multi-platform real time strategy game inspired by Total Annihilation, powered by the Spring game engine.|
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||Additional Information|
|AssaultCube||2006||2010||FPS||zlib||CC-AT-NC-SA||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||2010||Shoot 'em up||GPL||Freeware||Hotseat co-operative and deathmatch play for two players.|
|C-evo||1999||2008||TBТ, 4X||Public domain||Proprietary||Inspired by Sid Meier's Civilization.|
|CodeRED: Alien Arena||2004||2011||FPS||GPL||Proprietary||Based on ID Software open-source engine.|
|Cube||2002||2005||FPS||zlib||Proprietary||Deathmatch style multiplayer gameplay with map editing.|
|Cube 2: Sauerbraten||2004||2013||FPS||zlib||Various non-free licenses||Deathmatch style multiplayer gameplay with map editing.|
|Frogatto & Friends||2010||2011||Platformer||GPL||Proprietary||Initially for Windows, Linux, and Mac; hold and toss enemies, swim, talk; scripting language included.|
|Katawa Shoujo||2012||2012||Visual Novel||MIT license||CC-BY-NC-ND||A visual novel.|
|Mari0||2012||2012||Platformer||CC-BY-NC-SA||CC-BY-NC-SA||Remake of Super Mario Bros with elements from Portal.|
|Miner Wars 2081||2012||2013||Space Shooter||Proprietary||Proprietary||6DOF action-survival space-shooter simulation-game set in the year 2081. Full game and engine source code released.|
|Planeshift||2001||2012||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.|
|Racer||2003||2011 (Proprietary)||Sim Racing||GPL /
|Proprietary||Only source code of 0.5 version is available, all other releases are closed source.|
|Smokin' Guns||2009||2010||FPS||GPLv2||Proprietary||Western-themed first-person shooter using the ioquake3 engine.|
|Urban Terror||2000||2011||FPS||GPL||Proprietary||Multiplayer tactical shooter based on the id tech 3 engine.|
|Warsow||2005||2012||FPS||GPL||Proprietary||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.|
Open-source remakes with non-free content from the proprietary original 
The game remakes in this table were developed under an open-source license which allows only 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||Additional Information|
|CorsixTH||2009||2013||Business Sim||MIT||Proprietary (original game data)||An open-source clone of Theme Hospital.|
|Dune Legacy||2003||2011||RTS||GPL||Proprietary||Modern clone of Dune II which uses data files from the original game. New features include multiple unit selection/control, high resolution support, multiplayer gaming, improved GUI.|
|Exult||1992||2012||RPG||GPL||Proprietary||Engine remake of Ultima VII.|
|Freesynd||1993||2012||RTS||GPL||Proprietary||Engine remake of Syndicate.|
|Gigalomania||1991||2012||RTS||GPL||Proprietary / GPL (since version 0.21)||Clone of Mega Lo Mania which used data files from the original game. Substituted all data later against own artwork.|
|Gods -Deluxe-||1991||2011||Platform game||Public Domain||Proprietary||Remake of the Bitmap Brothers video game Gods.|
|Netnuclear||1989||2010||TBS||Public Domain||Proprietary||Clone of the Nuclear War TBS video game.|
|NXEngine||2010||2012||Shoot 'em up||GPLv3||Freeware||Open-source clone / engine for Doukutsu Monogatari (Cave Story) that depends on the original game data.|
|M.A.X.Gold||2005||2011||TBS||GPL||Proprietary||Remake of M.A.X.|
|OpenDune||2009||2011||RTS||GPLv2||Proprietary||Re-creation of Dune II that still depends on the original game files.|
|OpenRA||2007||2013||RTS||GPLv2||Freeware||Open source game engine remake supporting early Westwood games like Command & Conquer and Command & Conquer: Red Alert.|
|Pushover||1992||2011||Puzzle||GPLv3||Proprietary||Engine remake, needs the original data.|
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.
See also 
- 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
- "Jordan Trudgett's Ardentryst". Retrieved 2012-10-12.
- Jerz, D.G. "Colossal Cave Adventure". Seton Hill University. Retrieved 2007-09-07.
- "History". chaoticrage.com. Retrieved 2013-03-22.
- "UpFront". Linux Journal. July 2005.
- "Chromium B.S.U. About Page". 2008-06-20. Retrieved 2010-07-13.
- Re: CF: the beginning of crossfire
- "OpenSource - Doolfy's Brain Surgery". rephial.org. 2008-12-15. Retrieved 2009-04-04.
- "Savannah Git Hosting - freedoom.git/blob - COPYING". Git.savannah.gnu.org. Retrieved 2009-04-04.
- What is IVAN? on Ivanwiki
- IVAN's LICENSING file in it's CVS repository
- micropolis license
- Simser, Bil (2008-01-10). "SimCity Source Code Released to the Wild! Let the ports begin..." (in englisch). 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."
- "Minetest 0.4.5 released". 2013-03-05.
- "free-moria". Retrieved 2009-04-04.
- Knight, Jason. "Paku Paku - A game for early PC/MS-DOS Computers". deathshadow.com. "Contents of DEATHSHADOW'S MADNESS © Jason M. Knight unless otherwise noted All code presented on this site is released to the Public Domain. There'll be none of that open-source licensing malarkey in here - If you going to give something away, LANDS SAKE JUST GIVE IT AWAY!!!"
- 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.
- [tremulous] View of /trunk/COPYING
- "[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.
- Steel Storm Episode I
- STEEL STORM EPISODE 1 LIMITED USER SOFTWARE LICENSE AGREEMENT
- Prophet. (2002-03-28). "GameSpyDaily - Exult Interview". Archived from the original on 2002-04-02. Retrieved 2008-05-29.
- About FreeSynd
- Gods -Deluxe-
- "LICENSE". sourceforge.net. 2012-06-24. Retrieved 2012-06-24.
- Kuchera, Ben (2007-09-02). "EA gives away Command and Conquer Gold - EA wants to celebrate the 12th anniversary of Command and Conquer, and they …". Ars technica. Retrieved 2012-12-25.
|Wikimedia Commons has media related to: Free video games|