Open-source video games

virtual online world

open source, turn-based strategy game with a high fantasy theme

online puzzle game

Osu! (stylized as osu!) is a freeware rhythm game originally created and self-published by Australian developer Dean Herbert. It was released for Microsoft Windows on 16 September 2007, with later ports to macOS, Linux, Android and iOS.

free and open-source real-time strategy video game

SuperTux is a free and open-source 2D side scrolling platform video game inspired by Nintendo's Super Mario Bros. series. Players control Tux, the mascot of the Linux kernel, through a variety of levels and worlds to rescue his girlfriend, Penny, from the evil Nolok. Originally developed for Linux operating systems, the game has since been ported to Windows, Mac OSX, Steam, and other platforms.

2020 rhythm game

open-source winter sports racing video game

OpenTTD is a business simulation game in which players try to earn money by transporting passengers, minerals and goods via road, rail, water and air. It is an open-source remake and expansion of the 1995 Chris Sawyer video game Transport Tycoon Deluxe.

FlightGear Flight Simulator (often shortened to FlightGear or FGFS) is a free, open source multi-platform flight simulator developed by the project since 1997.

GCompris is a software suite comprising educational entertainment software for children aged 2 to 10. GCompris was originally written in C and Python using the GTK+ widget toolkit, but a rewrite in C++ and QML using the Qt widget toolkit has been undertaken since early 2014. GCompris is free and open-source software and the current version is subject to the requirements of the AGPL-3.0-only license. It has been part of the GNU project.

NetHack is an open source single-player roguelike video game, first released in 1987 and maintained by the NetHack DevTeam. The game is a fork of the 1984 game Hack, itself inspired by the 1980 game Rogue. The player takes the role of one of several pre-defined character classes to descend through multiple dungeon floors, fighting monsters and collecting treasure, to recover the "Amulet of Yendor" at the lowest floor and then escape.

Luanti (formerly Minetest) is a community-driven, free and open-source voxel game engine, available on various platforms. Originally, Luanti was a voxel game created in October 2010 by Perttu Ahola to explore the mechanics of Minecraft. Over time, Luanti evolved from the original Minetest game into a general game engine as developers integrated new features.

2010 video game

1994 video game

Freeciv is a single- and multiplayer turn-based strategy game for workstations and personal computers inspired by the proprietary ''Sid Meier's Civilization series. It is available for most desktop computer operating systems and available in an online browser version. Released under the GNU GPL-2.0-or-later, Freeciv'' is free and open-source software. The game's default settings are closest to Civilization II, in both gameplay and graphics, including the units and the isometric grid. However, with a lot of multiplayer games being played in longturn communities, rulesets and additional variants

Zork is a text adventure game first released in 1977 by developers Tim Anderson, Marc Blank, Bruce Daniels, and Dave Lebling for the PDP-10 mainframe computer. The original developers and others, as the company Infocom, expanded and split the game into three titlesZorkI: The Great Underground Empire, ZorkII: The Wizard of Frobozz, and ZorkIII: The Dungeon Masterwhich were released commercially for a range of personal computers beginning in 1980. In Zork, the player explores the abandoned Great Underground Empire in search of treasure. The player moves between the game's hundreds of locations a

2003 video game

graphics software

2005 first-person shooter video game developed by id Software

SuperTuxKart (STK) is a free and open-source kart racing game, distributed under the terms of the GNU General Public License, version 3. Its initial version was released in 2007. It features mascots of various open-source projects. SuperTuxKart is cross-platform, running on Linux, macOS, Windows, iOS (beta), Android systems and Nintendo Switch (homebrew).

2012 supernatural horror video game

2002 video game

FreeCol is a 4X video game, a clone of ''Sid Meier's Colonization. FreeCol is free and open source software released under the GNU GPL-2.0-or-later. In 2023, the FreeCol'' project reached its 1.0 release, after twenty years of development.

1994 action-adventure game developed by Adeline Software International

Nexuiz is a free first-person shooter video game developed and published by Alientrap. It was released on May 31, 2005 under the GNU General Public License (GPL) and uses the DarkPlaces engine, a modified Quake engine. A remake, also called Nexuiz, was released for Steam and Xbox 360 using CryEngine 3.

1999 Windows strategy video game by Pumpkin Studios published by Eidos, revived by Warzone 2100 Project

1997 video game

1980 video game

Tremulous is a free and open source asymmetric team-based first-person shooter with real-time strategy elements. Being a cross-platform development project the game is available for Windows, Linux, and Mac OS X.

2000 video game

StepMania is a cross-platform rhythm video game and engine. It was originally developed as a clone of Konami's arcade game series Dance Dance Revolution, and has since evolved into an extensible rhythm game engine capable of supporting a variety of rhythm-based game types. Released under the MIT License, StepMania is open-source free software.

2001 free side-view multiplayer action game

2002 video game

thumb|Some penguins marching in the snow Pingus is a free software game programmed by German developer Ingo Ruhnke. It is a clone of Lemmings in which the characters are penguins instead of lemmings.

open-source first-person shooter game

OpenArena is a free and open-source video game. It is a first-person shooter, and a fork of ioquake which in itself was a fork of Quake III Arena.

AssaultCube, formerly ActionCube, is an open source first-person shooter video game, based on Cube and using the Cube Engine. Although the main focus of AssaultCube is multiplayer online gaming, a single-player mode consists of computer-controlled bots.

modification for the Grand Theft Auto series of video games

2006 video game

thumb|Screenshot of X-Moto 0.6.1 thumb|Screenshot (in-detail zoom) X-Moto is a free and open source 2D motocross platform game developed for Linux, FreeBSD, Mac OS X and Microsoft Windows, where physics play an all-important role in the gameplay. The basic gameplay clones that of Elasto Mania, but the simulated physics are subtly different.

thumb|Teeworlds screenshot of a Jungle map. Teeworlds (formerly TeeWars) is a free, open-source sidescrolling multiplayer shooting game originally created by the Swedish developer Magnus Auvinen and now maintained by the community. It features simple cartoon-themed graphics and physics and relies heavily on classic shooter weaponry and gameplay. Currently there are official versions for Microsoft Windows, Linux, macOS as well as being available via the digital distributor Steam since 2015. The source code is publicly available.

Simutrans is a cross-platform simulation game in which the player strives to run a successful transport system by constructing and managing transportation systems for passengers, mail and goods by land (rail, road, tram, monorail, maglev), air (airplanes) and water (ship) between places. Like OpenTTD, Simutrans is an open-source transportation game based on the Transport Tycoon idea.

Lincity is a free and open-source construction and management simulation game, which puts the player in control of managing a city's socio-economy, similar in concept to SimCity. The player can develop a city by buying appropriate buildings, services and infrastructure. Its name is both a Linux reference and a play on the title of the original city-building game, SimCity, and it was released under the GNU General Public License v2.

thumb|Race track in Torcs in top-down view thumb|Comparison of the reflections system of TORCS 1.3.3 (left) and Speed Dreams 2.0 (right): Front view of a racing car split by a bright line; the right part shows more vivid reflections TORCS (The Open Racing Car Simulator) is an open-source 3D car racing simulator available on Linux, FreeBSD, Mac OS X, AmigaOS 4, AROS, MorphOS and Microsoft Windows. TORCS was created by Eric Espié and Christophe Guionneau, but project development is now headed by Bernhard Wymann. It is written in C++ and is licensed under the GNU GPL. TORCS is designed to enable

2013 video game

2002 video game

free and open source vehicle-simulation game

2008 open-source computer game

is a free visual novel video game developed by the dōjin group Stage-nana, telling the story of a terminally ill young man and woman. It was made with the NScripter engine.

Xonotic () is a free and open-source first-person shooter video game. It was developed as a fork of Nexuiz, following controversy surrounding the game's development. The game runs on a heavily modified version of the Quake engine known as the DarkPlaces engine. Its gameplay is similar to the Quake 3 Arena series of games, but with various unique elements.

2004 video game

1984 video game

video game whose source code is open-source software

1995 video game

2003 video game

roguelike video game, open source, first release version in 1990, community driven development up to now

1994 video game

1998 video game

thumb|254px|Four tribes in Widelands Build 20 thumb|254px|Screenshot of a game taken in 2008 thumb|254px|Screenshot of the "Dolomites" map in Widelands Build 19