List of open-source video games

This is a selected list of free/libre and 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 a free and open-source license with free content which allows reuse, 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 release Genre Engine license Content license Dimensions Other information
0 A.D. 2009 2016 RTS GPLv2+ CC BY-SA 3.0 3D Historical, cross-platform RTS, using an original engine named Pyrogenesis. Game source-code released July 10, 2009.[1]
2048 2014 2014 Puzzle MIT MIT 2D A sliding block puzzle game.
Abuse 1996 2011 Run and gun Public domain software Public domain 2D
Armagetron Advanced 2001 2015 Racing GPLv2+ GPLv2+ 3D A multiplayer, 3D Tron lightcycle racing game.
AstroMenace 2007 2013 Arcade GPLv3+ GPLv3+, CC BY-SA 4.0 3D A top-scrolling space shooter.
Ballerburg 1987 2008 (ports) Artillery game Public domain software Public domain 2D Public domain software on the authors website with source code.[2] Later ported to other systems as Linux, MacOS, iOS etc.
Battle for Wesnoth, The 2005 2016 TBТ GPLv2 GPLv2 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 zlib 2D ?
Blob Wars 2003 2009 Platformer, Action-adventure GPLv2 GPLv2, CC BY-SA, other open source 2D, 3D ?
Bos Wars 2004 2013 RTS GPLv2 GPLv2 Isometric 2D 2D RTS running on a modified version of the Stratagus engine.
BZFlag 1997 2016 Tank FPS LGPLv2.1 LGPLv2.1 3D A first-person shooter 3D tank based multiplayer online game.
C-Dogs SDL 2002 2016 Run and gun GPLv2 CC0, CC BY, CC BY-SA 2D Overhead run and gun, with hotseat co-operative and deathmatch play for up to four players.
Candy Box 2 2013 2013 incremental browser video game GPLv3 GPLv3 2D The typescript source code of Candybox2 was released under the GPLv3.[3][4]
Cataclysm: Dark Days Ahead 2013 2015 RPG/Roguelike CC BY-SA CC BY-SA 2D A post-apocalyptic, survival roguelike with an open-ended gameplay. Had a successful crowdfunding campaign on kickstarter.com on 22 June 2013.[5]
Chromium B.S.U. 2000 2013 Arcade Clarified Artistic MIT ? A fast paced, arcade-style, top-scrolling space shooter
Colobot 2001 2012 RTS, Educational GPLv3+ GPLv3+ 3D Source code released in 2012
Colossal Cave Adventure 1976 1995 Text adventure Public domain software[6] Public domain Text The original text adventure game by Crowther / Woods.
Crossfire 1992 2014 MMORPG GPLv2+ GPLv2+ ? Crossfire originally started as a Gauntlet clone[7] developed by Frank Tore Johansen at the University of Oslo, Norway.[8]
Diamond Trust of London 2012 2012 TBS Public domain software 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.[9]
Dungeon Crawl Stone Soup 2006 2016 Roguelike GPLv2+ CC0 ? An open-source fork of the 1997 game Linley's Dungeon Crawl.
Endgame: Singularity 2005 2011 science fiction/AI simulation game GPLv2 GPLv2 2D written in Python
Enigma 2003 2014 Puzzle GPLv2 GPLv2 2D Oxyd clone.
Fish Fillets NG 2004 2011 Puzzle GPLv2 GPLv2 ? Released commercially as Fish Fillets in 1998. Source released in 2002 under the GPL.
FlightGear 1997 2016 Flight Sim GPLv2 GPLv2 3D Microsoft Flight Simulator inspired clone.
Freeciv 1996 2016 TBS GPLv2 GPLv2 Isometric 2D Civilization II clone.
FreeCol 2003 2015 TBS GPLv2 GPLv2 Isometric 2D Sid Meier's Colonization clone.
Freedoom 1993 (2001) 2015 FPS BSD 3-clause BSD 3-clause[10] 2.5D Doom content/resource clone.
Frozen Bubble 2002 2008 Puzzle GPLv2 GPLv2 2D Puzzle Bobble clone.
Gang Garrison 2 2008 2016 Shooter MPLv2 MPLv2 2D A retro "demake" of Team Fortress 2. The project was previously been under GPLv3.
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 in open beta.
GLtron 2003 2016 Racing GPL GPL 3D Based on the light cycle portion of the film Tron.
GNOME Games 1997 2016 Various GPL GPL ? A collection of games accompanying the rest of the GNOME desktop environment.
GNU Chess 1984 2016 TBS GPLv3 GPLv3 2D ?
GNU Go 1999 2009 TBS GPLv3 GPLv3 ? ?
Hedgewars 2007 2015 Artillery game GPLv2 GPLv2 2D Worms clone.
kdegames 1997[11] 1998[12] 2009 Various* GPLv2 GPLv2 *Collection of games provided with the official release of KDE.
kiki the nano bot 2003 2007 Puzzle Public domain software Public domain ? Mixture of Sokoban and Kula World.
Lincity 1999 2013 City-building game GPL GPL 2.5D SimCity clone.
Linley's Dungeon Crawl 1997 2005 Roguelike LGPL LGPL ? Roguelike game.
Liquid War 1995 2015 Maze games GPL GPL 2D 2D game in which you control particles and move them to defeat the opposing side.
Maelstrom 1992 2010 Shoot 'em up GPL CC-BY 2D
MegaGlest 2010 2016 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[13] GPLv3 ? Open-source release of SimCity. Also known as OLPC SimCity.[14]
Moria 1983 1999 RPG/Roguelike GPL[15] GPL 2D A roguelike RPG based heavily on J. R. R. Tolkien's novel The Lord of the Rings.
NetHack 1987 2015 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.
Neverball 2003 2014 Platform GPL GPL 3D
Nexuiz 2005 2009 FPS GPL GPL 3D Forked into Xonotic following a commercial licensing agreement by a minority of the development team.
Oolite 2006 2016 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 2016 Action, RTS, Platform ISC CC BY 2D Successor of the Clonk shareware series
Passage 2007 2007 Side-scroller Public domain software Public domain 2D In 2007 Rohrer released the game's source code and assets into the public domain,[16] while asking for donations (Donationware) and selling the iOS version for $0.99.[17]
Pingus 1998 2011 Puzzle GPL GPL 2D Lemmings clone.
Pioneer 2006 2016 Space sim GPLv3 CC BY-SA 3D Inspired by Frontier: Elite 2
PokerTH 2006 2014 Card GPL GPL 2D ?
PySol 2001[18] 2009 Card games, Patience GPLv3 Public domain and GPLv3 2D ?
Rigs of Rods 2007 2016 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 2016 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.
Seven Kingdoms 1997 2016 RTS GPL GPL 2D Source code released in 2009.
Simutrans 1997 2016 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.
Sopwith 1984 2014 Shoot 'em up GPL GPL ? The C and x86 assembly source code to Sopwith was released in 2000,[19] at first under a non-commercial use license, but later under the GNU GPL at the request of fans.[20]
Space Station 13 2003 2016 RPG AGPLv3 CC BY-SA 3.0 2D A multiplayer, 2D, sprite and tile based role playing game. Written in BYOND.
Speed Dreams 2010 2016 Sim racing GPLv2+ FAL 3D Forked from TORCS in late 2008.
StepMania 2005(?) 2016 Rhythm game MIT[21] MIT 2D and 3D A DDR clone, the player must hit buttons or keys in time with the music.
SuperTux 2003 2016 Platformer GPL GPL 2D 2D platformer inspired by the Super Mario series.
SuperTuxKart 2006 2016 Racing GPL GPL 3D Arcade racing game similar to Mario Kart.
Teeworlds 2007 2015 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 software Public domain 2D A game by Jason Rohrer, developed on a Sourceforge[22] repository and sold on Steam for $14.99.[23]
Tremulous 2006 2009 FPS GPLv2 CC BY-SA 2.5[24] 3D Alien VS human base building, defending, and attacking opposite team.
TripleA 2002 2016 TBS GPLv2 GPLv2 2D A turn based strategy game inspired by Axis & Allies and board game engine. Development is ongoing.
Tumiki Fighters 2004 2004 Shooter BSD 2-clause[25] BSD 2-clause 3D Written in D and released in 2004 by Kenta Cho[26] under a BSD-like license, like all his games. Later commercially ported to Wii as Blast Works: Build, Trade, Destroy,[27] as well as linux.[28] Included in Debian,[29] ported to Pandora.[30]
Tux Racer 2000 2009 Racing GPLv2+ GPLv2+ 3D ?
Tux, of Math Command 2001 2011 Educational game GPLv3+ GPLv3+ 2D ?
UFO: Alien Invasion 2006 2016 TBТ GPLv2+ GPLv2+, CC BY-SA 3.0 3D Inspired by the XCOM-series, but with 3D-combats on surface of the earth.
UltraStar Deluxe 2007 2016 Music GPLv2+ GPLv2+ 2D SingStar clone.
Unknown Horizons 2008 2014 City-building game GPLv2+ GPLv2+, CC BY-SA 3.0, OFLv1 Isometric 2D Genre-mix of city-building game and real-time strategy game, inspired by the Anno series.
Unvanquished 2012 2016 FPS BSD 3-clause, GPLv3+ CC BY-SA 2.5 3D Team-based first person shooter with strong RTS elements, derived from the Tremulous project.
Vega Strike 2008 2012 Space Sim GPLv2+ GPLv2+ 3D Elite clone and space simulator engine.
Warmux 2002 2011 Artillery game GPLv2+ GPLv2+ 2D Worms clone.
Warsow 2005 2016 FPS GPLv2+ CC BY-SA 4.0 3D A fast-paced arena FPS with movement tricks.
Warzone 2100 1999 2016 RTS, RTT GPLv2+ GPLv2+ 3D Post-apocalyptic, cross-platform RTS.
Widelands 2002 2016 RTS GPLv2+ GPLv2+ ? Widelands is a RTS clone of The Settlers II.
WorldForge 1998 2014 MMORPG GPLv3 GPLv2+ 3D An open-source framework for massively multiplayer online role-playing games.
Xconq 1987 2005 TBS GPLv2+ GPLv2+ ? 4X strategy game engine.
X-Moto 2005 2014 Platformer GPLv2+ GPLv2+ 2D Elasto Mania Clone.
Xonotic 2010 2015 FPS GPLv2+ GPLv2+ 3D A fork and direct successor of the game Nexuiz. Binary files for Linux and Windows is under GPLv3+.
XPilot 1992 2010 Arcade GPLv2+ GPLv2+ 2D A multiplayer Asteroids-like game.
Yo Frankie! 2008 2009 Action-adventure GPLv2+, LGPLv2.1 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 reuse 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 use, the whole games are non-free and restricted in reuse (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 release Genre Engine license Content license Dimensions Other information
Angband 1990 2016 Roguelike GPLv2 GPLv2, Proprietary[31] Text ?
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-evo 1999 2008 TBТ, 4X Public domain software Proprietary ? Inspired by Sid Meier's Civilization
Cart Life 2011 2014 Simulation Cart Life's Free License (permissive) Cart Life's Free License (permissive), 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.[32][33] Winner of the IGF 2013 award.[34]
CodeRED: Alien Arena 2004 2011 FPS GPL Proprietary[35] ? 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 zlib license Proprietary[36] ? Initially for Windows, Linux, and Mac; hold and toss enemies, swim, talk; scripting language included.
H-Craft Championship 2007 2015 Racing zlib[37] Free for personal use[38] 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[39]) CC BY-NC-ND 2D A visual novel.
Kroz 1987 2009 Maze GPL Freeware ? Game source released on March 20, 2009.
Narcissu 2005 2005 Visual novel GPL Freeware/PFSL[40] 2D Is a free visual novel by the dōjin group stage-nana, telling the story of a terminally ill young man and woman. The english version was made with the ONScripter engine.[41]
Lugaru 2005 2010 Action Third Person GPL Proprietary 3D A game where the player is an anthropomorphic rabbit who seeks revenge when a group of enemy rabbits kill their family.
OpenRCT2 2014 2016 Business Sim GPL Proprietary 2D OpenRCT2 is an open-source re-implementation of RollerCoaster Tycoon 2
OpenTTD 2005 2016 Business Sim GPLv2 GPLv2, CC Sampling Plus 2D An open-source clone of 'Transport Tycoon Deluxe'
PlaneShift 2001 2016 MMORPG GPL Proprietary 3D Free to play MMORPG.
Star Wars Jedi Knight: Jedi Academy 2003 2009 Third-person shooter GPLv2 Proprietary 3D Source code was released as GPLv2 by Raven Software and Activision following the dissolution of Lucas Arts in 2013.
Steel Storm: Episode I 2010 2010 Action GPLv2[42] CC BY-NC-SA 3.0[43] ? 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 2016 RPG/Roguelike GPLv3+ GPLv3+, Proprietary[44] 2D Developed open-source from the beginning with the own T4E engine,[45] while the assets are kept proprietary for commercialization on Steam and gog.com.[46][47]
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)[48] Freeware 2D Shoot-'em-up game released for DOS in 1993 by Swiss company Alpha Helix. Source code released 1995.
TORCS 1997 2016 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 GPLv3+ GPLv3+, Proprietary 3D Some datas are non-free, for example the "SV" car model, under a CC BY-NC-SA license.
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 2016 RTS GPLv2+ CC BY-NC-ND 2.0[49] 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 reuse, modification 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.

   Title    First release Last release Genre Engine license Content license

Dimensions

 Other information
CorsixTH 2009 2016 Business simulation MIT Proprietary 2D Engine remake of Theme Hospital.
Exult 1992 2012 RPG GPLv2+ Proprietary 2D Engine remake of Ultima VII.[50]
Heart of The Alien Redux 2005 2005 Platform game GPL Proprietary 2D Engine remake of Heart of the Alien.[51]
OpenMW 2008 2016 RPG GPLv3+ Proprietary 3D Engine remake of The Elder Scrolls III: Morrowind.
OpenRA 2007 2016 RTS GPLv3+ Proprietary 2D Engine remake of Command & Conquer: Red Alert.
REminiscence 2005 2011 Platform game GPL Proprietary 2D Engine remake of Flashback (1992 video game).[52]

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 reuse 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 release Genre Engine license Content license

Dimensions

 Other information
Hero Core 2010 2013 Shooter game ? Freeware 2D Around 2013 Daniel Remar released the Gamemaker source code of the game, together with the sources of his other games like Iji.[53]
Flow 2006 2009 Life simulation ? (educational purposes) Freeware 2D (layered) Around 2009 the flash source code was made available for educational purposes by the developers.[54]
Fortress Forever 2007 2016 FPS Proprietary ? 3D Unofficial, open-source Source engine successor to Team Fortress Classic.
I Wanna Be the Guy 2007 2011 Platform game Shared source like Freeware 2D On November 9, 2011 the developer Michael "Kayin" O'Reilly released the source code of the game under a own software license (forbidding new content)[55][56] so that the game's community would be able to create fixes and patches.[57]
Jump 'n Bump 1998 1999 Deathmatch Platformer Emailware[58] Emailware 2D 1998 freeware DOS platform video game, written in C and Assembly language by Brainchild Design. The source code was released in 1999, then source ported to several other operating systems and platforms via SDL.
Larn 1986 2016 Roguelike Non-commercial Freeware Text ?
Mari0 2012 2012 (stable), 2014 (unstable) Platformer CC BY-NC-SA 3.0 CC BY-NC-SA 3.0 2D Remake of Super Mario Bros with elements from Portal.
Notrium 2003 2008 Top-down shooter survival game custom FOSS license / GPLv3 custom FOSS license / Freeware 2D Notrium's source code was released by the developer after 2003 under a custom software license and is developed as OpenNotrium on GitHub since then, with new code being GPLv3.[59]
Progress Quest 2002 2011 Parody MMORPG ? Freeware 2D On May 20, 2011, Eric Fredricksen released the source code of the game on bitbucket.[60][61]
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 2008 2009 Platformer Non-commercial[62] 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.[62] Based on this source code the game community created a community patch which added support for Mac OS X.[63][64] For the later remade 2012 release the source code wasn't provided, only for the 2008 "Classic" Spelunky version.
Visual Pinball 2000 2016 Pinball simulation editor and game MAME like license diverse 3D 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.

See also

References

  1. ↑ "0 A.D. Open Source Release". wildfiregames.com.
  2. ↑ April 1987: Ballerburg - Zwei Spieler, zwei Burgen und ein Berg dazwischen... on eckhardkruse.net "Ich habe das Programm als Public Domain veröffentlicht (die Unterscheidung in Freeware, Shareware usw. gab es damals nicht), mit der Bitte um eine 20 DM Spende. Dafür gab es dann die erweitere Version und den Quellcode." (in German)
  3. ↑ source code on candybox2.net
  4. ↑ Play This Right Now: Candy Box 2 by Nate Ralph on PCworld.com (Oct 24, 2013)
  5. ↑ "Cataclysm: Dark Days Ahead - Dedicated Developer". Kickstarter.
  6. ↑ Jerz, D.G. "Colossal Cave Adventure". Seton Hill University. Retrieved 2007-09-07.
  7. ↑ ftp://ftp.ifi.uio.no/pub/crossfire/historic
  8. ↑ "Re: CF: the begining(sic) of crossfire". real-time.com.
  9. ↑ Jason Rohrer (2011-10-17). "DiamondTrust/ci/default/tree". SourceForge. Retrieved 2013-05-22.
  10. ↑ "Savannah Git Hosting - freedoom.git/blob - COPYING". Git.savannah.gnu.org. Retrieved 2009-04-04.
  11. ↑ "The KDE Games Open Source Project on Open Hub". ohloh.net.
  12. ↑ "KDE - KDE 1.0 Release Announcement". kde.org.
  13. ↑ "Micropolis Downloads". donhopkins.com.
  14. ↑ 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.
  15. ↑ "free-moria". Retrieved 2009-04-04.
  16. ↑ supportMyWork on hcsoftware.sourceforge.net "I release all of the source code that I write as free software (free as in "freedom") into the public domain so that others can learn from my work and make use of my source code in their own projects. I also release all of my software in compiled binary form (in other words, "ready-to-run") into the public domain, with no restrictions on use or redistribution." (accessed 2016)
  17. ↑ Passage on itunes.apple.com
  18. ↑ "All releases of PySol – Freecode". freecode.com.
  19. ↑ Clark, Dave (2000-10-29). "Sopwith Code Support". Retrieved 2006-12-01.
  20. ↑ Clark, Dave. "Sopwith – Source Code". Dave Clark's Home Page. Retrieved 2006-12-01.
  21. ↑ "stepmania/stepmania". GitHub.
  22. ↑ CastleDoctrine on sourceforge.net
  23. ↑ Castle Doctrine on store.steampowered.com
  24. ↑ [tremulous] View of /trunk/COPYING
  25. ↑ [abagames.sakura.ne.jp/windows/tf0_2.zip tf0_2.zip] "Copyright 2004 Kenta Cho. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution."
  26. ↑ doujin-classics-the-works-of-kenta-cho on ricedigital.co.uk
  27. ↑ The Indie Shooter Roundtable: Mak, Cho, And Omega Fire At Will by Brandon Sheffield on Gamasutra.com
  28. ↑ TUMIKI fighters on sourceforge.com
  29. ↑
  30. ↑ who is Kenta Cho?
  31. ↑ The sounds are licensed under the CC BY-NC-SA license. Shockbolt's graphics are licensed under a non-free license.
  32. ↑ Petitte, Omri (20 March 2014). "Cart Life exits Steam, goes open source". PC Gamer. Retrieved 21 March 2014.
  33. ↑ cartlife_opensores.zip on the author's dropbox
  34. ↑ "The 17th Annual Independent Games Festival". igf.com.
  35. ↑ "[alienarena] Log of /trunk/docs/license.txt". Svn.icculus.org. Retrieved 2010-07-13.
  36. ↑ Developer Info Source Code and License: [...] Our code is open-source, our content isn’t.
  37. ↑ "For the most part H-Craft Championship sources are released under the zlib-license."
  38. ↑ 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.
  39. ↑ "Katawa Shoujo Forums • View topic - Please release Katawa Shoujo source code as free software". renai.us.
  40. ↑ narcissu.txt
  41. ↑ narcissu on insani.org
  42. ↑ "Steel Storm Episode I". blendernation.com.
  43. ↑ "STEEL STORM EPISODE 1 LIMITED USER SOFTWARE LICENSE AGREEMENT". 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.
  44. ↑ COPYING-MEDIA on git.net-core.org/tome "All the medias located in all the "/data/gfx" folders are granted to use with the Tales of Maj'Eyal game only. Please contact darkgod@te4.org for more informations." (2016)
  45. ↑ COPYING on git.net-core.org/tome (2016)
  46. ↑ "Tales of May'Eyal on Steam". Steam. Retrieved 26 December 2013.
  47. ↑ "Release: Tales of Maj'Eyal and Ashes of Urh'Rok expansion". GOG. 4 November 2014. Retrieved 5 November 2014.
  48. ↑ beersrc.zip - readme "Do whatever your want" license
  49. ↑ "license.txt". github.com.
  50. ↑ Prophet. (2002-03-28). "GameSpyDaily - Exult Interview". Archived from the original on 2002-04-02. Retrieved 2008-05-29.
  51. ↑ Megidish. (2005-01-12). "Heart of The Alien - Redux". Retrieved 2016-10-15.
  52. ↑ Montoir. (2011-03-11). "REminiscence". Archived from the original on 2015-08-01. Retrieved 2015-08-13.
  53. ↑ resources on remar.se "source code"
  54. ↑ You can get it here. on thatgamecompany.com by Jenova Chen (Sep 21, 2009)
  55. ↑ "Fix My Game: IWBTG Source Code Release". Kayin.pyoko.org. Retrieved 2015-03-26.
  56. ↑ DIYGamer: Recursive Romhackery – I Wanna Be The Guy Source Code Released (2011)
  57. ↑ "IWBTG! - Downloads!". Kayin.pyoko.org. Retrieved 2015-03-26.
  58. ↑ 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!
  59. ↑ copying github.com OpenNotrium
  60. ↑ Source Code ReleasedProgressQuest v6.3
  61. ↑ pq on bitbucket.org
  62. 1 2 Spelunky User License v1.1b
  63. ↑ 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.
  64. ↑ "Spelunky v1.3 (and Source) - Now for Mac OS X and Windows". 2012-09-12. Retrieved 2012-10-05.
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