Open-source games
This is a list of notable open-source video games. Open-source video games are assembled from and are themselves open-source software, including public domain games with public domain source code. This list also includes games in which the engine is open-source but other data (such as art and music) is under a more restrictive license.
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| Cover | Title | Released | Release | Genre | Engine license | Content license | Dimensions | Platforms |
|---|---|---|---|---|---|---|---|---|
| Open engine and free data | ||||||||
 | 0 A.D. | 2009 | 2026 | RTS | GPL-2.0-or-later | CC BY-SA 3.0 | 3D | Historic, cross-platform RTS, using an original engine named Pyrogenesis; source-code released July 10, 2009 |
 | 2048 | 2014 | 2014 | Puzzle | MIT | MIT | 2D | Sliding block puzzle |
 | A Dark Room | 2013 | 2023 | Online text-based role-playing game | MPL | MPL | Text | In July 2013, source code was put on GitHub under MPL 2.0; became commercial success after source code release |
 | Abuse | 1996 | 2011 | Run and gun | Public-domain software | Public domain | 2D | |
 | Argentum Online | 1999 | 2018 | MMORPG | GPL-3.0-or-later | GPL-3.0-or-later | 2D | First open-source MMORPG developed in Argentina |
 | Armagetron Advanced | 2001 | 2024 | Racing | GPL-2.0-or-later | GPL-2.0-or-later | 3D | Multiplayer 3D Tron lightcycle racing |
 | AstroMenace | 2007 | 2025 | Arcade | GPL-3.0-or-later | GPL-3.0-or-later, CC BY-SA 4.0 | 3D | Top-scrolling space shooter |
 | Ballerburg | 1987 | 2008 (ports) | Artillery game | Public-domain software | Public domain | 2D | Public-domain software on author website with source code; later ported to more operating systems: Linux, macOS, iOS, etc. |
 | The Battle for Wesnoth | 2005 | 2026 | TBT | GPL-2.0-or-later | GPL-2.0-or-later, CC BY-SA 4.0 | 2D | Turn-based tactical strategy game with RPG elements; campaign and skirmish modes for single- and multi-player |
 | Biniax | 2005 | 2012 | Puzzle | zlib | zlib | 2D | |
 | Bos Wars | 2004 | 2013 | RTS | GPL-2.0-or-later | GPL-2.0-or-later | Isometric 2D | 2D real-time strategy game running on modified version of Stratagus engine |
 | Brogue | 2009 | 2018 | Roguelike | GNU AGPLv3 | GNU AGPLv3 | Text | Like its predecessor Rogue, the goal is for the player to descend to the last dungeon level and retrieve the Amulet of Yendor. |
 | BZFlag | 1997 | 2025 | Tank, FPS | LGPL-2.1-only and MPL-2.0 | LGPL-2.1-only and MPL-2.0 | 3D | First-person shooter 3D tank-based multiplayer online game |
 | C-Dogs | 2002 | 2026 | Run and gun | Public-domain software (engine), GPL-2.0-or-later (game code) | CC0, CC BY, CC BY-SA | 2D | Overhead run-and-gun, with hotseat cooperative and deathmatch play for up to four players |
 | Cart Life | 2011 | 2017 | Simulation | Cart Life's Free License (permissive license) | Cart Life's Free License (permissive license), Freeware | 2D | In March 2014, source code and game released by Richard Hofmeier for free online, saying he was ending support; Winner of the IGF 2013 award; mirrored on GitHub |
 | Cataclysm: Dark Days Ahead | 2013 | 2026 | RPG, Roguelike | CC BY-SA 3.0 | CC BY-SA 3.0 | 2D | Post-apocalypse survival roguelike with open-ended play; financed by successful Kickstarter crowdfunding campaign, 22 June 2013 |
 | Chromium B.S.U. | 2000 | 2016 | Arcade | Clarified Artistic | MIT | 2D | Fast-paced arcade-style top-scrolling space shooter |
 | Colobot | 2001 | 2021 | RTS, educational | GPL-3.0-or-later | GPL-3.0-or-later | 3D | Source code of original game by EPSITEC SA released March 2012; since then, maintained by community as Colobot: Gold Edition |
 | Colossal Cave Adventure | 1976 | 1995 | Text adventure | Public-domain software | Public domain | Text | First text adventure game, by Crowther and Woods |
 | Core War | 1984 | 1984 | Programming game | Various (public domain, BSD, GPL) | Various | Text | Original created by D. G. Jones and A. K. Dewdney; continued to present by community |
 | Crossfire | 1992 | 2019 | MMORPG | GPL-2.0-or-later | GPL-2.0-or-later | 2D | Crossfire first begun as a Gauntlet clone developed by Frank Tore Johansen at University of Oslo, Norway |
| Cubyz | 2019 | 2026 | Sandbox, survival | GPL-3.0 | GPL-3.0 | 3D, Voxel | A sandbox game focusing on exploration, building, and survival | |
 | Danger from the Deep | 2003 | 2010 | Submarine simulator | GPL-2.0-or-later | GPL-2.0-or-later | 3D | WWII U-boat simulator |
| DDraceNetwork | 2013 | 2024 | Platformer | zlib | CC BY-SA 3.0 (except font) | 2D | 2D online multiplayer side-scrolling co-op platformer | |
 | Diamond Trust of London | 2012 | 2012 | TBS | Public-domain software | Public domain | 2D | After Kickstarter crowdfunding campaign, Diamond Trust was developed by Jason Rohrer and published by indiePub; released for Nintendo DS August 28, 2012; placed in public domain, hosted on SourceForge, like most Rohrer games |
 | DRL | 2013 | 2016 | Roguelike | GPL-2.0-or-later | CC BY-SA 4.0 | 2.5D | Based on Doom and Doom II |
 | Duelyst | 2016 | 2023 | Collectible card game | CC0 | CC0 | 2D | Built using Node.js, open source release 2023 |
 | Dungeon Crawl Stone Soup | 2006 | 2026 | Roguelike | GPL-2.0-or-later | CC0 | 2D | Fork of 1997 Linley's Dungeon Crawl |
| Endgame: Singularity | 2005 | 2020 | Science fiction/AI simulation game | GPL-2.0-or-later | CC BY-SA 3.0 | 2D | Written in Python by EMH, later continued by community | |
 | Endless Sky | 2015 | 2026 | Space trading and combat simulator | GPL-3 | Public domain, various CC licenses | 2D | Inspired by Escape Velocity series; updated continuously |
 | Enigma | 2003 | 2021 | Puzzle | GPL-2.0-or-later | GPL-2.0-or-later | 2D | Oxyd clone |
 | Fish Fillets NG | 2004 | 2011 | Puzzle | GPL-2.0-or-later | GPL-2.0-or-later | 2D | Released commercially as Fish Fillets in 1998. Source released in 2002 under GPL-2.0-or-later |
 | FlightGear | 1997 | 2026 | Flight sim | GPL-2.0-or-later | GPL-2.0-or-later | 3D | Microsoft Flight Simulator-inspired clone |
 | Freeciv | 1996 | 2026 | TBS | GPL-2.0-or-later | GPL-2.0-or-later | Isometric 2D | Civilization II clone |
 | FreeCol | 2003 | 2024 | TBS | GPL-2.0-or-later | GPL-2.0-or-later | Isometric 2D | Sid Meier's Colonization clone |
 | FreeDink | 2006 | 2019 | RPG | GPL-3.0-or-later | GPL-3.0-or-later | 2D | Dink Smallwood fork with non-free assets replaced with free ones |
 | Friday Night Funkin' | 2020 | TBA | Rhythm game | Apache License 2.0 | The Funkin' Crew Inc. | 2D | An upcoming 2D Rhythm game that follows a character called Boyfriend (yes that's his actual name) as he rap battles various opponents in order to date his Girlfriend (yes that's also her actual name). |
 | Frozen Bubble | 2002 | 2008 | Puzzle | GPL-2.0-only | GPL-2.0-only | 2D | Puzzle Bobble clone |
 | Gang Garrison 2 | 2008 | 2019 | Shooter | Proprietary (engine), MPLv2 (game code) | MPLv2 | 2D | Retro "demake" of Team Fortress 2; project formerly under GPLv3 |
 | Glest | 2004 | 2008 | RTS | GPL-3.0-or-later | CC BY-SA 3.0 | 3D | 3D real-time strategy game with two factions, AI, and same-platform networking support. Development ceased in 2008. Two forks exist, named MegaGlest and Glest Advanced Engine |
 | Globulation 2 | 2008 | 2009 | RTS | GPL-3.0-or-later | GPL-3.0-or-later | 2D | In open beta as of 2019 |
 | GLtron | 2003 | 2016 | Racing | GPL-2.0-or-later | GPL-2.0-or-later | 3D | Based on the light cycle portion of the film Tron |
 | GNOME Games | 1997 | 2021 | Various | GPL-3.0-or-later | GPL-3.0-or-later | Set of games included with GNOME desktop environment | |
 | GNU Chess | 1984 | 2025 | TBS | GPL-3.0-or-later | GPL-3.0-or-later | 2D | Chess-playing engine developed by GNU Project |
 | GNU Go | 1999 | 2009 | TBS | GPL-3.0-or-later | GPL-3.0-or-later | 2D | Go-playing engine developed by GNU Project |
 | Hunt the Wumpus | 1973 | 1981 | Survival horror, adventure, puzzle | Various (Public-domain software, GPLv2, MIT) | Various (Public-domain software, GPLv2, MIT) | 2D | Hunt a monster named Wumpus while moving through caves |
 | HyperRogue | 2011 | 2021 | Puzzle, Roguelike, Educational | GPL-2.0-or-later | GPL-2.0-or-later | Hyperbolic | Puzzle roguelike in the hyperbolic plane |
 | kiki the nano bot | 2003 | 2007 | Puzzle | Public-domain software | Public domain | 3D | Mixture of Sokoban and Kula World |
 | Lincity | 1999 | 2013 | City-building game | GPL-2.0-only | GPL-2.0-only | 2.5D | SimCity clone |
 | Liquid War | 1995 | 2015 | Maze games | GPL-3.0-or-later | GPL-3.0-or-later | 2D | 2D game; control particles and move them to defeat the opposing side |
 | Luanti (formerly Minetest) | 2010 | 2026 | Sandbox, survival | zlib (engine), LGPL-2.1-or-later (game code) | LGPL-2.1-or-later | 3D, Voxel | Voxel engine for building games similar to Infiniminer and Minecraft |
 | Lugaru | 2005 | 2017 | Action, third-person shooter | GPL-2.0-or-later | CC BY-SA | 3D | By Wolfire Games; player is an anthropomorphic rabbit who seeks revenge when a group of enemy rabbits kill their family |
| Madness Interactive Reloaded | 2024 | 2025 | Shoot 'em up | GPL-3.0-or-later | CC BY 3.0 | 2D | highly moddable 2D shooter developed by Studio Minus that aims to capture the fast-paced, violent combat of the Madness Combat series from Newgrounds | |
 | Maelstrom | 1992 | 2010 | Shoot 'em up | GPL-2.0-only | CC BY 3.0 | 2D | |
 | Mari0 | 2012 | 2018 | Platformer | zlib (engine), MIT (game code) | MIT | 2D | Remake of Super Mario Bros. with elements from Portal |
 | MegaGlest | 2010 | 2016 | RTS | GPL-3.0-or-later | CC BY-SA 3.0 | 3D | Cross-platform 3D real-time strategy game for up to eight players (can be AI-controlled) on seven factions. MegaGlest is a fork of Glest |
 | Meridian 59 | 1996 | 2024 | MMORPG | GPL-2.0-only | GPL-2.0-only | 2.5D | Free MMORPG; fight alongside friends, side with powerful factions, explore diverse environments |
 | Mindustry | 2017 | 2026 | RTS, TD, sandbox | GPL-3.0 | GPL-3.0 | 2D | The automation tower defense RTS, written in Java |
 | Moria | 1983 | 1999 | RPG, Roguelike | GPL-2.0-only | GPL-2.0-only | 2D | Roguelike RPG based heavily on J. R. R. Tolkien's novel The Lord of the Rings |
 | NetHack | 1987 | 2026 | RPG, Roguelike | NetHack GPL | NetHack GPL | Text | Single-player dungeon exploration game |
 | Netrek | 1988 | 2020 | Shoot 'em up | MIT | MIT | 2D | Successor to 1986 Xtrek, Netrek was first played in 1988; was the third Internet game, the first Internet team game, and as of 2022 is the oldest Internet game still played actively |
 | Nexuiz | 2005 | 2009 | FPS | GPL-2.0-or-later | GPL-2.0-or-later | 3D | Forked into Xonotic |
 | NoGravity | 1997 (?) | 2005 | Space shooter | GPL-2.0-or-later | GPL-2.0-or-later | 3D | Source code of Wing Commander-inspired game released by realtech VR February 16, 2005 |
 | One Hour One Life | 2018 | 2023 | Survival | Public domain | Public domain | 2D | Multiplayer co-op survival game |
 | Oolite | 2006 | 2020 | Space sim | GPL-2.0-or-later | Dual-licensed under GPL-2.0-or-later, CC BY-NC-SA 3.0 | 3D | Elite clone |
 | OpenArena | 2005 | 2012 | FPS | GPL-2.0-or-later | GPL-2.0-or-later | 3D | Quake III clone |
 | OpenCity | 2003 | 2008 | City-building game | GPL-2.0-or-later | GPL-2.0-or-later | 3D | SimCity clone |
 | OpenClonk | 2010 | 2018 | Action, platformer | ISC | CC BY | 2D | Successor of the Clonk shareware series |
 | OpenTTD | 2005 | 2026 | Business sim | GPL-2-0-only | GPL-2-0-only, GPL-2-0-or-later, CC BY-SA 3.0, CDDL 1.1 | 2D | Open-source clone of Transport Tycoon Deluxe |
 | Passage | 2007 | 2007 | Side-scroller | Public-domain software | Public domain | 2D | Rohrer released source code and assets into public domain, 2007, while asking for donations (donationware) and selling an iOS version for $0.99 |
 | Pingus | 1998 | 2011 | Puzzle | GPL-3.0-or-later | GPL-3.0-or-later | 2D | Lemmings clone |
 | Pinball Construction Set | 1982 | 1983 | Pinball, game creation system | MIT | MIT | 2D | First construction set video game, and one of the initial Electronic Arts releases |
 | Pioneer | 2006 | 2026 | Space sim | GPL-3.0-only | CC BY-SA | 3D | Inspired by Frontier: Elite 2 |
 | PokerTH | 2006 | 2026 | Card | AGPL-3.0-or-later | AGPL-3.0-or-later | 2D | Open-source virtual poker game |
 | Red Eclipse | 2011 | 2019 | FPS | zlib | CC BY-SA | 3D | Fork of Cube 2: Sauerbraten, with improved graphics and play incorporating parkour movement |
 | Rigs of Rods | 2005 | 2022 | Vehicle sim | GPL-3.0-or-later | GPL-3.0-or-later | 3D | Rigs of Rods was initially created as an off-road truck simulator, but has developed into a versatile physics sandbox |
| ROTA | 2022 | 2025 | Puzzle platformer | Switched from Unlicense to MIT | Switched from Unlicense to MIT | 2D | Platformer; player rotates world to solve puzzles | |
 | Ryzom | 2004 | 2024 | MMORPG | AGPL-3.0-or-later | CC BY-SA 3.0 | 3D | All textures, effects, 3D models, animations, characters, clothing (no music or sounds) under CC BY-SA |
 | Scorched 3D | 2001 | 2014 | Artillery game | GPL-2.0-or-later | GPL-2.0-or-later | 3D | Clone of Scorched Earth |
 | SCP - Containment Breach | 2012 | 2018 | Survival horror | zlib (game engine), CC BY-SA 3.0 (game code) | CC BY-SA 3.0 | 3D | Horror; based on SCP Foundation collaborative writing project |
 | Secret Maryo Chronicles | 2003 | 2014 | Platformer | GPL-3.0-or-later | GPL-3.0-or-later | 2D | 2D platformer inspired by Super Mario series |
 | Space Station 14 | 2015 | 2026 | RPG | MIT | CC BY-SA 3.0 | 2D | Space Station 13 remake, intended as successor |
| The Secret Chronicles of Dr. M. | 2017 | 2020 | Platformer | GPL-3.0-or-later | GPL-3.0-or-later | 2D | 2D platformer inspired by Super Mario series |
 | Seven Kingdoms | 1997 | 2017 | RTS | GPL-2.0-or-later | GPL-2.0-or-later | 2D | Source code released in 2009 |
 | Shattered Pixel Dungeon | 2014 | 2026 | Rogue-like game | GPL-3.0-or-later | Java | 2D | Rogue-Like game with procedurally generated levels and a storyline |
 | Simutrans | 1997 | 2026 | 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 | Based on Blender Foundation film Sintel |
 | Soldat | 2002 | 2020 | Action | MIT | CC BY 4.0 | 2D | Source code release May 26, 2020, under MIT on GitHub |
 | Sopwith | 1984 | 2014 | Shoot 'em up | GPL | GPL | 2D | C and x86 assembly source code released in 2000, at first under a non-commercial use license, then later under GNU GPL at request of fans |
 | Speed Dreams | 2010 | 2023 | Sim racing | GPL-2.0-or-later | FAL | 3D | Forked from TORCS in late 2008 |
 | SuperTux | 2003 | 2026 | Platformer | GPL-3.0-or-later | Various | 2D | 2D platformer inspired by Super Mario series |
 | SuperTuxKart | 2006 | 2022 | Racing | GPL-3.0-or-later | Various | 3D | Arcade racing game similar to Mario Kart |
 | Teeworlds | 2007 | 2020 | Platformer | zlib | CC BY-SA 3.0 (except font) | 2D | 2D online multiplayer side-scrolling shooter |
 | Tenés Empanadas Graciela | 1996 | 2021 | TBS | GPL-2-0-only | GPL-2-0-only | 2D | Based on the boardgame Risk |
 | The Castle Doctrine | 2014 | 2014 | MMO | Public-domain software | Public domain | 2D | By Jason Rohrer, developed on a SourceForge repository and sold on Steam for $15.99 |
 | The Powder Toy | 2010 | 2023 | Sandbox game | GPL-3.0-only | GPL-3.0-only | 2D | Falling-sand game |
| Thrive | 2013 | 2026 | God game, Life simulation game | 3D | ||||
 | Tremulous | 2006 | 2009 | FPS | GPLv2 | CC BY-SA 2.5 | 3D | Alien vs. human base-building, defending, and attacking the opposing team |
 | TripleA | 2002 | 2020 | TBS | GPL-3.0-or-later | GPL-3.0-or-later | 2D | Turn-based strategy; inspired by board game Axis & Allies; development ongoing |
 | Tux Racer | 2000 | 2009 | Racing | GPL-2.0-or-later | GPL-2.0-or-later | 3D | Downhill slalom racing game featuring Tux, the Linux mascot |
Table data adapted from its source, CC BY-SA 4.0.