Games released under GNU General Public License. The GPL is one of the free software licenses, probably the most common one.
List of GPL games
This is a list of free/libre gPL games:
|0 A.D.||2018-12-23||RTS, Historical|
0 A.D. is a historical 3D real-time strategy game developed by Wildfire Games. It takes place between 500 B.C to 500 A.D. and focuses on economy and war management. 0 A.D. offers a variety of playable civilisations whose characteristics are based on real world history.
2HFU or Too Hard for You is a combination of a Tetris game and a wall breaker game. The latest version of the game is version 1.3 released on June 2nd, 2007. It uses the SDL library and is written in the C++ programming language. It is licensed under the GPL.
|3Dc||1996-04-11||Chess, Board games||
3D chess is kind of a chess game on 3 boards. The pieces are mostly from chess. There are 26 directions to move. 3D chess comes with a computer opponent.
The game uses 2x2x2 levels, thus having a 8-cell bottom like most 2D Tetris games do.
The source code (there is no media, shapes are drawn automatically) is licensed under the GPLv3 or any later version.
8 Kingdoms is a 3D turn-based strategy game based on hexagons in which the player is a king in a fantasy world. It is licensed under the GPL. The media license is unknown. The latest version of the game is 1.10 released on July 22nd, 2007. It is written in the C++ and Tcl programming languages and uses the SDL library.
It was created as a project at the Faculty of Mathematics and physics at the Univerzita Karlova, Prague in 2004.
|ACM||1998||Flight simulation games|
ACM is a multiplayer flight simulator. Several civilian and military aircraft and two scenes are included. The game works without a server, the clients communicate using IEEE Distributed Interactive Simulation protocol (DIS).
|Abe's Amazing Adventure||March 5, 2005||Platform|
Abe's Amazing Adventure is a cross-platform, side scrolling platform game. It is similar to various platform games available for the Commodore+4.
|Adanaxis||A single-player 4D first person shooter in outer space|
Adanaxis is a deep space first-person shooter game in four spatial dimensions, written by Andy Southgate. The latest version of the game is 1.2.5. It is written in the C++ programming language using the GLUT library.
|Advanced Strategic Command||2015-12-06||Turn-based strategy|
Advanced Strategic Command is a turn based strategy game in the tradition of Battle Isle.
ASC can be played against the computer or against other players.
Aisleriot is the official patience card game suite for the GNOME desktop. It comes with over 80 games including some of the most popular such as Freecell, Klondike, and Spider. The cards can be themed.
|Alex the Allegator 4||September 10th, 2003||Platformer|
The game’s story begins as is usual for platform games: humans abduct Alex’s girlfriend, and he has to find and save her.
The game was released on September 10th, 2003.
|Alexei: Part IX||2010-06-30||Adventure|
Alexei: Part IX is a free software graphical adventure game originally released by Piga Software on May 19, 2009. It is the first Piga Software program to use the Gambas Adventure Engine and is also the first Piga Software game released for GNU/Linux and other POSIX systems.
You take the role of Alexei Volkov, master criminal, who is intent on robbing the house of a cruel and ruthless businessman. After gaining access to the main hall with the help of a disgruntled servant, Alexei must search out the mansion and find out the location of the owner's vault. Once this is accomplished he must escape the mansion.
A preview release for the next title in the series, Part XIII, is available from the Piga Software website.
|Allure of the Stars||2019-05-02||Roguelike, RPG, TBS|
Allure of the Stars is a near-future Sci-Fi roguelike and tactical squad game. Binaries and the game manual are available at the homepage, where you can also try the game out in the browser. (http://allureofthestars.com/play Keyboard commands and savefiles are supported only on recent enough versions of browsers. Mouse should work everywhere.)
Not a single picture in this game. You have to imagine everything yourself, like with a book (a grown-up book, without pictures). Once you learn to imagine things, though, you can keep exploring and mastering the world and making up stories for a long time. The gameplay manual  may also help. Enjoy!
|Anagramarama||July 1st, 2003||Puzzle||
Anagramarama is a cutesy little game where you try to form as many words as possible from given letters in a limited time. It is licensed under the GNU GPL version 2+. This game does not require 3D hardware acceleration.
|Annchienta||February 13th, 2009||RPG|
Annchienta is a single-player role-playing game engine written by Jasper Van der Jeugt. It takes place in a 2d, tile-based isometric fantasy world. It is licensed under the GPL.  The latest version of the engine is svn902, released on February 13th, 2009.It is written in the C++ programming language.
|Annex: Conquer the World||2014-10-05||Real-time Strategy||
Annex: Conquer the World is a Megaglest based Real-time Strategy game that brings fast paced combat with a diverse arsenal. Play as one of four available factions: The East Ocean Alliance, the NEO Republic, the Shadow Organization, or the Renegades as you struggle for dominance all over the world, competing for a priceless red mineral. The game will contain over 30 tech trees, different maps, and tileset. The focus of the game is Multiplayer and Single Player skirmishes. Currently there are no plans for campaigns or story mode, however this may change once base game is complete.
A gameplay video on YouTube: Annex: conquer the World 4.0 Republic Mission 6
Antigravitaattori is a multiplayer flying saucer game.
|Apricots||August 13th, 2003||Arcade, Side-scroller||
The latest version of the game was 0.2.6 released on August 13th, 2003.
Ardentryst is an RPG and side-scroller written by Jordan Trudgett. As of 2009-09-19, the latest version of the game is 1.71 released on May 6th, 2009. It was written in the Python programming language and uses the Pygame library.
|Arena of Honour||January 11, 2005||FPS|
Arena of Honour is a multiplayer first-person shooter game written by Artur hallman and Nils Keller. The latest release of the game is version .83 on January 11, 2005.  It is written in the C++ programming language.
Arkhart is a role-playing game engine. It's goal is to provide game designers with the tools necessary to create role-playing games. The game arkhart is developed by the Nekeme Prod. association. Unfortunately the project is at a halt, and EdB is the only active maintainer. Fresh coders are needed. The art (textures,3D,music) is great.
|Armagetron Advanced||2016-11-27||Arcade games|
Armagetron Advanced is a game based on the light cycle scene from the movie Tron. It has extensive multi-player and network support but also supports AI computer players. It is licensed under the GPLv2. The media license is unknown.
The Armagetron Advanced project was registered with SourceForge.net on June 2, 2004,. Although there is a news post of the older Armagetron project dated March 29th, 2000. The project's history goes back to 2000 when it was called 'Walls'.
Atomix is a puzzle game designed for GNOME, in which the player must arrange "atoms" to build molecules by pushing the atoms, which move until they hit a wall.
Auralquiz is a music guessing game, which plays samples from the user’s sound file library, and lets the user guess (choose or type in) the artist or title from the file tags.
|Azimuth||2018-06-25||Top-down shooter, Adventure|
Azimuth is an action-adventure game, combining 2D top-down shooter action with exploration of a large map. The gameplay involves piloting a freely rotating forwards-thrusting ship through a variety of environments, shooting and dodging the attacks of various enemies, solving environmental puzzles, and the gradual revelation of a science-fiction plot.
BRIQUOLO is a 3D clone of the game Breakout.
Balazar III is an adventure game with a multiplayer mode written by Jean-Baptiste Lamy. It provide two graphical client, the first in 3D using OpenGL, Soya, the second in 2D using SDL, Pygame. The networking code is shared. It is written in the Python programming language. The latest version of the game is 0.1 released on August 30th, 2008.
The version 0.1 work, but only provide one actor, one monster, and one object.
|Balder2D||June 14, 2008|
Balder2D is a game that involves zero-gravity combat. The game is being developed by Bjørn Hansen and Reuben Lord. It is the successor of Balder3D. It is licensed under the GNU General Public License.
|Balder3D||Oct. 26th, 2003||FPS||
|Ball and Paddle||September 30, 2008|
Ball and Paddle is a simple ball and paddle game designed to be extensible through GNU Guile. It is part of the GNU project. It was written by Eric P. Hutchins. It is written in the C++ programming language and uses the SDL library. The latest version of the game is 0.8.0 released on September 30th, 2008.
|Barbie Seahorse Adventures||Platformer|
Barbie Seahorse Adventures was a Platformer created for pyweek 4 by The Olde Battleaxe (TOBA), and won the team entry. It is licensed under the GPL. It is written in the Python programming language and uses the Pygame library.
|Barrage||July 28th, 2011||Arcade||
Barrage is an arcade shooter game, similar to a shooting gallery. It is part of the LGames games collection. This game does not require 3D hardware acceleration.
|Bastet||May 29th, 2014||Tetris|
Bastet is a tetris clone that stand for Bastard Tetris. It based on Petris, a public domain Tetris clone by Peter Seidler, and developed by Federico Poloni, with a complete rewrite at version 0.43. As of 2015-01-07, the latest version of the game is 0.43.1. It is licensed under GPLv3+. Version 0.37 was the first public release of the game. It is written in C++.
|Battle Tanks||3 Sep 2008||Arcade|
Battle Tanks is an arcade battle game. The game's source code and media are licensed under the GNU General Public License. The latest version of the game is version 0.8.7686 announced on September 3rd, 2008.
|Battles of Antargis||2008-01-01||RTS|
The Battles of Antargis is an RTS set in the medieval ages written by David Kamphausen. It is in an early development stage and is licensed under the GPL. The latest version of the game is 0.2.1.5 released on January 1, 2008.
Berusky is a sokoban style game, published under GNU Public License.
|BillardGL||April 26th, 2002|
|Billiards||December 6th, 2010|
Biogenesis is an artificial life simulator. It simulates organisms, their workings and their environment.
Bitfighter is an outer-space combat action game. There are difference ways of playing such as space exploration for warfare and construction.
|Black Shades Elite||FPS||
Blackvoxel is a 3D voxel sandbox game. The backstory takes place in the future, with the player finding themselves on a mysterious planet, after the crash of their spaceship.
|Blades of Exile||2015-03-15||RPG|
Blades of Exile is an RPG of the Exile series, released in 1997 by Spiderweb Software for the Windows and Macintosh platforms. The game was created after the main trilogy and provides three little scenarios and a scenario editor.
Blasphemer is an FPS project whose initial goal is to serve as a Free data package for engines based on the GPLed Heretic source. The IWAD data is released under a 3-clause BSD license. Its theme is dark fantasy with inspirations from metal music and horror.
Blinken is the KDE implementation of the memory game “Simon Says”, similar to its hardware implementation called “Simon”.
It is a part of the KDE Education Project (KDEEdu).
|Blob Wars Episode 1 : Metal Blob Solid||April 17nd, 2011||Platform game|
The latest version of the game is 1.19 released on April 17, 2011.
|Blob Wars Episode 2 : Blob And Conquer||November 4th, 2009||Third-person shooter|
Blob Wars: Blob And Conquer is a 3D action game created by Parallel Realities using the SDL library. The source code of the game is licensed under the GPL. The music and sound effects are not free, and thus have been removed from the Debian package. It is the sequel to Blob Wars Episode 1 : Metal Blob Solid. The latest version of the game is 1.10 released on November 4th, 2009.
|Bloboats||November 23rd, 2010||Racing|
Bloboats is a side-scrolling arcade racing game. The game is similar to X-Moto, but the player controls a jet boat instead of a motorcycle.
|Block Attack - Rise of the Blocks||2019-05-25||Puzzle games|
|Bloodmasters||2007-05-02||Top-down shooter, Arcade|
In February 26th, 2008, the game was released under GPL.
|BomberClone||November 12th, 2010||Arcade games|
|Bos Wars||2013-06-16||Real-time strategy|
Bos Wars (formerly known as Battle of Survival) is a futuristic real-time strategy game. The player has to develop a war economy in order to combat his enemies. In order to be successful the economic needs need to be balanced against building an army. Controlling strategic passages plays an important role.
Boson is a 3D RTS game that uses OpenGL, parts of the KDE libraries and the QT library, that has its code and media licensed under the GPL. Version 0.13, released on October 1, 2006, is the latest version of the game. Its reliance on KDE-only libraries has caused it to be difficult to install for many users and has limited its audience.
|Bouncy the Hungry Rabbit|
Bouncy the hungry rabbit was written by Richard T. Jones for PyWeek and designed it so that it could be enjoyed by his 3 year old daughter, hence it isn't violent. This also means that easy is very easy and hard is very challenging.
|Brain Workshop||October 12th, 2010||Puzzle|
Brain Workshop is a puzzle game designed for the purpose of mental exercise written by Paul Hoskinson.The latest version of the game is 4.8.1 released on October 12,th, 2010. It is written in the Python programming language and is licensed under the GPL.
|Brickshooter||May 7, 2008||Puzzle|
Brikx is a puzzle game with the goal to clear levels navigating your way around walls. It is licensed under the GPL.
|British Bingo||2020-01-23||Board game||
British Bingo is a 90-ball bingo game with 3 by 9 boards. The computer simulates your opponents who act like elderly people, e. g. by making mistakes and chatting. The number of players and the speed of the game is configurable.
There is no source code repository, but the source code is available for download.
|BuggyGame||March 28th, 2007||Side-scrolling games||
buggyGame is a single-player side-scrolling survival-exploration game where a moon buggy is driven across the surface of Earth and Moon. Written by Chris Hopp during the Ludum Dare competition the game uses the Python programming language and the Pygame library.
The story goes that the player is an astronaut about to explore the moon, but his/her buggy just bluescreened (apparently, it was written using the Evil Empire's code). The player must now manually navigate his/her frail buggy to his/her rocket to win.
bweakfwu is an arcade game by plaimi that mixes Breakout with PONG. It features local multi-player. The current version is alpha-1.
|Bygfoot||July 16, 2009|
Bygfoot is a football management game. The player must manage a football team, from making player contracts and training to the maintenance of the stadium.
|CAVEZ of PHEAR||2011-11-30||Arcade game, Action game||
CBoard is a text-mode chess game front-end and editor for PGN (Portable Game Notation) files. It uses unicode characters to display chess pieces.
|CannonSmash||November 23, 2003||Sports||
Canta is a karaoke game, currently in development by Andreas Kattner, Stefan Huchler and Felix Rodriguez Lopez, programmed in the Python programming language. As of 2011-06-23, the latest version is 0.2.1 released on 2011-05-22, and is licensed under the GNU General Public License version 3 or later.
|Caph||2010-10-25||Physics simulation, puzzle||
Caph is a physics simulation puzzle game in which the player has to get a red and a green circle together.
Similar to the proprietary Crayon Physics game, Caph has the user draw objects such as ramps, fulcra, levers, and weights to move a ball to the destination using the laws of physics.
|Chaos Esque Anthology||2020-06-03||1st person shooter|
Chaos Esque Anthology is a first-person shooter forked of Xonotic, it includes new features such as extended number of weapons (including medieval weapons), new maps, vehicles, spellcasting, monsters, player characters, textures and game modes.
|Cheese Boys||April 26th, 2009||RPG||
Cheese Boys is an RPG game written in Python using the Pygame library by Keul (Luca Fabbri). The latest version of the game is 0.2.0 released on April 26th 2009. It is licensed under the GPL.
|Chess3D||Chess, Board games|
Chess3D is a HTML/WebGL 3D chess game with AI.
|Childish Cannoneer||2012-09-15||Artillery and Adventure|
Childish Cannoneer is the first venture of the "Indie Games" project hosted by White Island Software at the Gambas Forum, and participated in by Piga Software through Graham L. Wilson. The aim of the project is to make computer games to show off the Gambas language, with the eventual hope of inclusion in the Humble Indie Bundle for maximum attention. It is to feature a little boy building a makeshift air cannon from spare parts only to terrorize his older sister, and potentially the whole neighbourhood, while evading the wrath of his father. The majority of the game's multimedia are derived from vector graphics taken from OpenClipart and sound effects taken from SoundBible. Contributions to this project, or the creation of other entities for the Indie Games project, are more then welcome.
chrząszcz (meaning beetle in Polish) is a maze game in which the player needs to pass through chambers. The chambers are connected by locked doors which require keys that can be obtained by trading with Orcs.
chrząszcz was started in 2009, but was revived in 2013.
|Civil||August 9, 2004||TBS, Online||
Civil is a turn-based strategy game mainly focused in the American civil war. The game features networked multi-player and is available for multiple platforms. The development of the game stopped in 2005.
|Civitas||June 25th, 2009||City building, Online, Kids|
Civitas is a city building game for kids. It is written in the Java programming language and licensed under the GPL. As of 2011-07-26, the latest version of the game is 0053 released on June 25th, 2009.
Clonepoint is a clone of a proprietary game Gunpoint. It is a stealth game where the player has to climb buildings, avoid guards and hack computers.
|Codewars||no image||December 31th, 2004||Programming|
Codewars is a programming game written by Timo Hallek and Ronny Peine. The latest version of the game is 0.3.0 RC4 on December 31th, 2004. It is licensed under the GPL. The game was written in the C++ and Perl programming languages.
Colobot - colonise with bots - is a combination of a real-time strategy and a programming game. The player takes the role of an astronaut with the mission to find a habitable planet, after humankind plunged the Earth into an ecological catastrophe. The player is not on their own, but accompanied by programmable robots that can help in building and defending structures. Through a satellite link with 'Houston' she/he is directed to complete a number of missions on different planets. The game also involves a rather aggressive though evolving relationship with native alien lifeforms.
Apart from the missions, there are also two game modes that instruct the player in the use of CBOT, the language used to program the bots. This language is rather similar to C++ and Java. During the missions, it's not really necessary to write code for the bots, but it is convenient to be able to adapt the programs Houston offers to the player. Version 0.1.6 introduced the Code Battle game mode, where players first provide all programs needed to operate a base and/or kill all enemies, and then let the programmed bots do their job without the possibility to interfere. The game provides three types of enemies: passive targets, pre-programmed bots and hot-seat play against a fellow human.
|Combat Simulator Project||September 21, 2007||Flight Simulation|
Combat Simulator Project aka CSP is an aerial combat simulator. The latest version of the game is 0.2180 released on September 21, 2007. It is primary written in the C++ programming language and is licensed under the GPLv2.
|Comisat Games Collection||2006-10-10||Snake, Hangman,, Tetris, Board game.|
comisat Games Collection is a collection of free software games written in Gambas. It is one of the first notable Gambas games, with exceptions being code examples such as recreations of Snake, Robotfindskitten, and other small efforts. The game is available in English and Italian.
|Construo||April 10, 2013|
Crack Attack! is a puzzle game by Daniel Nelson and Andrew Sayman which is a clone of Nintendo's Tetris Attack. It is written using the SDL and GLUT library. It is licensed under the GPL. As of 2011-07-26, the latest version of the game is 1.1.14.
|Crimson Fields||March 1, 2009||TBS|
Crimson Fields is a tactical turn-based war game of two opposing sides (Empire of Kand and Free Nexus Army). Facing either the computer or another player, turns are taken to move various military units and attack the opposition. As of 2011-07-26, the latest version of the game is 0.5.3 released on March 1st, 2009..It is licensed under the GPL.
Critterding - Evolving Artificial Life is a life and evolution simulator.
In the default configuration the simulator generates a world with food and critters with random bodies and brains. Critter have sensors such as detection of food touching their head and perform actions such as moving, eating or procreating.
Some randomly created critters will have sufficient properties to sustain a population and evolve.
|Curse of War||2013-08-16||Real-time strategy, Text-mode|
Curse of War is a text-mode made using the ncurses library for Linux. It has both single and multiplayer modes.
CuteMaze is a puzzle game written by Graeme Gott and licensed under the GPL. The latest version of the game is 1.1.1 released on February 3rd, 2014. It uses the Qt library. The game's website features an optional tipping section near the downloads, as a pay what you want model. It features installers for Windows, macOS, a wide variety of Linux distributions (as well as Flatpak), FreeBSD and even OS/2.
|Cuyo||October 2014 (as of 2016-07-02)||Tetris-like games|
|Cytopia||2020-04-14||City building game|
Cytopia is a free, open source city building game with a big focus on mods. It utilizes a custom, SDL2 based rendering engine written in C++. It will combine the spirit of SimCity 2000 with everything a modern 2D city building game should offer.
DNT (formaly known as DccNiTghtmare) is a free 3D single player RPG in a satirical post-apocalyptical world. The game development started in early 2005 and is still active today.
|DQM||no image||2015-04-26||puzzle, Platform|
The idea of the project has been around since 2014 and it started that year in C++.
Defendguin is a 2D arcade game written by Bill Kendrick of New Breed Software. It is a game based on the classic Defender only featuring the Linux kernel mascot Tux, a common open source video game trope.
The game features gameplay almost identical to Defender except for an optional big boss and ending sequence. The game features Tux defending his people from aliens (similar to the character from XBill) bent on turning them into evil penguinoids.
The game has become quite popular, being reviewed by Linux Journal twice, as well as GamesForLinux.de and GP32 Homebrew Reviews. The populairty of the game has lead New Breed to merchandise it in the form of a mug and mouse pad for sale.
The game has been released for Linux (RPM, binary), Microsoft Windows, Mac OS X, Zaurus, Zeta, BeOS, Haiku, Amiga OS 4, MorphOS, QNX and RiscOS. It was also made as GP32, Nintendo DS, Nintendo Wii, Sega Dreamcast and Sony PSP homebrew.
|Deliantra||2012-02-06 (client), 2010-03-31 (server)||MMORPG, RPG|
|Domino On Acid||2009-12-23||Puzzle||
This a colorful variant of dominoes is a simple matching game. The inference rules of natural deduction are the basis for the game. Proof of a tautology are coded as solvable level.
|Eat the Whistle||2008-05-20||Sports|
Eat the Whistle is a 2D football game originally developed by Hurricane Studios. The game was originally developed for the Amiga platform and released under the GPL license version 2 in the year 2002.
Egoboo is a 3D role-playing game. The stated aim of the developers is "to create a fully free, 3D, Rogue and Zelda-like in the spirit of Nethack". Both the data and the source code are licensed under the GPL. It is written in the C programming language.
Einstein Puzzle is a puzzle game based on an old DOS game called Sherlock, based on the “zebra puzzle” or “Einstein’s puzzle” (which is often thought to have been invented by Albert Einstein) and written using SDL. It licensed under the GPLv2.
|EmMines||3D minesweeper puzzle||
emMines is a 3D minesweeper game that is included in the Eagle Mode environment. Written by Oliver Hamann in C++, it is released under the GNU General Public License version 3. As of 2008-06-25, the latest version is included in Eagle Mode 0.71.0.
Emilia Pinball is a pinball simulator created by Henrik Enqvist. It is licensed under the GPL. An editor for making new tables, Pinedit, is also available. The latest version of the game is 0.3.1 released on December 9, 2003. It was written in the C++ programming language.
Empty Clip is a 2D role-playing game written by Alan Witkowski in 2006. The game is licensed under the GPLv2. The latest version of the game is 1.0.3 released on 7 April, 2008. It is written in the C++ programming language with the SDL library.
Endgame: Singularity is a RTS game that simulates a true AI. It is written in the Python programming language using the pygame library by a programmer with the pseudonym evilmrhenry. It is licensed under the GPL. It was originally written for the first PyWeek competition. This game does not require 3D hardware acceleration.
Endless Sky is a space exploration, trading and combat game inspired by the old proprietary game Escape Velocity. Players can earn money by trading, carrying passengers, and completing missions. It is also possible to go pirate hunting and participate in a civil-war. Or one can go exploring, leave human space behind, and hope to find some friendly aliens whose culture is more civilized than your own...
Erebus is an classic point-n-click style RPG (role playing game) with 2D graphics. It is available for PCs, smartphones, tablets and handhelds. The current alpha version is already playable.
At this stage there are 3 quests and randomly generated dungeons.
Eskimo-run is a tutorial game that covers most of the basics for making a game in Pygame/Python. The development team is HoleInTheHeadStudios. The game is licensed under the GNU General Public License. The latest version of the game is 0.1 released on June 2nd, 2006.
|Extreme Tux Racer||2020-04-08||Racing, 3D||
Extreme Tux Racer is a racing game which forked off Tux Racer after work on it ceased. It was formerly known as Planet Penguin Racer. The latest version of the game is 0.8 released on April 08th, 2020.
FLTrator is a simple retro style arcade side-scroller game in which you steer a spaceship through a landscape with hostile rockets and other obstacles. It has ten different levels and a level editor to create new levels or modify the existing.
It is written in C++, uses the FLTK library and has no other dependencies.
|Fall of Imiryn||2009-02-13||RPG|
|Feuerkraft||April 19th, 2003|
|Fictional Air Combat||March 5th, 2011|
Fictional Air Combat is a flight simulator in the early development stages. It does not to simulate real aircraft or historical war scenarios, only fictional ones, hence the name. The game revolves around fighter aircraft.
|Fish Fillets - Next Generation||2011-09-09||Puzzle, Sokoban-style|
Fish Fillets - Next Generation is a puzzle game. Fish Fillets was a commercial game until 2004 when it is licensed under the GPL. This rewrote for modern operating systems adds the "Next Generation" to the title. It is written in C++, with Lua used for level scripting and the game uses the SDL library.
The voice dialogs are in Czech. The subtitles have been translated into multiple languages — see the categories of this article at the bottom.
|Flare: Empyrean Campaign||2019-05-17||RPG|
Flare: Empyrean Campaign is an action RPG set in a medieval fantasy world in which the protagonist is banished into the land of Empyrean and must prove your worth to escape damnation.
In the beginning of the game, the player gets to choose what race the in-game character should have. Each race has different abilities and skills (such as Strength, Health, Magic and Stealth). As the player completes missions and defeat enemies, the character will receive experience-points and level up. Levelling up will allow the player to improve skills and abilities of the character.
By completing missions and looting dead enemies, the player will collect gold. This can be used to purchase new equipment, weapons and armour at different traders.
|Flatland||no image||2015-01-01||puzzle, Platform|
The idea of the project is around since 2013-2014. The source code was released under the GPL and media was released under the CC-BY in late 2014.
FlightGear is a 3D flight simulation game. The entire game is licensed under the GNU General Public License. It is also sold on 3 DVDs. It is written in the C++  and C  programming languages.
The project was started in 1996, with its first release in 1997.
Flukz is a shoot them up game, with levels that can be edited in the same way as a wiki. The latest version of the game is 0.4, released in February 2014.
|Forest patrol||2007-05-27||Category:Real-time strategy|
Forest patrol is a Real-time strategy game, where you control some archers and need to fight enemy archers.
It was created by trailblazer as a warmup for Pyweek 4. The game is licensed under the GPLv2. Forest patrol also used the Directicus, a library also created by trailblazer. The latest version of the game is 1.0 released on May 27, 2007.
|FreeCol||2015-10-17||TBS, Economic simulation|
In February 2007, it received the Sourceforge.net Project of the Month award. 
Dink Smallwood is an adventure/role-playing game, similar to Zelda (2D top view), made by RTsoft. The game features the twisted adventure of young Dink Smallwood, a pig farmer who leaves his town and goes on a quest to save the world.
GNU FreeDink is a new and portable version of the game engine, which runs the original game as well as its D-Mods, with close compatibility, under multiple platforms. It also comes with the DFArc front-end to manage and play Dink Modules (or D-Mods for short): fans-made new add-ons - some of them bigger than the original game. And if you want to make your own adventure, the FreeDinkedit game editor awaits you.
|FreeGish||2010||Platformer, Physics simulation||
Freegish is a physics simulation platformer where you control a blob of tar. It can slick and slide and jump. There is also a multiplayer with modes like sumo wrestling and football.
FreeOrion is a turn-based strategy game of galactic conquest inspired by the Master of Orion games. As is typical for 4X games, players have to explore their surroundings, colonize new planets, manage their economies, research spectacular technologies, build up military might and conquer their neighbors, and ultimately, the entire galaxy. Features specific to FreeOrion are the diverse fantastical species and peculiar history of the game galaxy, the design of new ships with a multitude of hulls and ship parts available after research, and the possibility of technological victory after researching transcendence.
The game's source code is licensed under the GPL v2 and its media under the Creative Commons Attribution-ShareAlike 3.0 license.
|FreeTrain||2007-06-04||Transport infrastructure game|
FreeTrain is a rail and business simulation computer game, originally created by Kohsuke Kawaguchi and inspired by the A-Train series of games. Both the source code and the graphics are licensed under a combination of the LGPL and the GPL.
|Free Reign||July 29th, 2001||City simulator|
Free Reign is a 3D city simulator written by Alexander Taylor. The latest version of the game is 0.2.1 on July 29th, 2001. The game is written in the C++ programming language. It is licensed under the GPL. It became the inspiration for the OpenCity project.
|Free Tennis||November 21th, 2007||Sport|
Free Tennis is a tennis game written by Maurizio Colucci. It is licensed under the GPLv2. The latest version of Free Tennis is 0.4.8 released on November 21, 2005. It is written in the OCaml programming language.
Freeciv is a 2D turn-based strategy game, inspired by Sid Meier's Civilization series, where players control an empire to "eXplore, eXpand, eXploit, and eXterminate" (4X). Both code and media are licensed under the GNU General Public License. Freeciv is mostly written in the C programming language. This game does not require 3D hardware acceleration. The game is also playable as an HTML5 Web game.
Freedoom is a project aimed to create a complete and free Doom IWAD file, which contains all game media. Combined with the GPLed Doom Source (such as PrBoom or GZDoom), this makes a completely Free (as in speech) game. Freedoom's data is licensed under the Modified BSD License.
Freekick 3 is a soccer game. It includes a set of made-up teams and an importer script for real team data.
GCompris is a high quality educational software suite comprising of numerous activities for children aged 2 to 10.
Some of the activities are game orientated, but nonetheless still educational.
Below you can find a list of categories with some of the activities available in that category.
Currently GCompris offers in excess of 100 activities and more are being developed. GCompris is free software, that means that you can adapt it to your own needs, improve it and, most importantly, share it with children everywhere.
For more specific use, it can be easlily configured to be run in a kiosk mode, so small children cannot accidentally switch to other programs.
On the technical level, GCompris is designed in a way which makes it easy to develop additional activities.
|GL-117||March 12th, 2005||Combat flight simulation|
GL-117 is a combat flight simulator by Thomas Drexl and others. The latest version is 1.3.2.
|GLtron||December 14th, 2003|
GNU Chess is a program that plays the ancient board game, Chess. It is licensed under the GPLv2. It was one of the first major games to be developed deliberately as free software. On the game Free Software Foundation founder Richard M. Stallman said "We even developed a chess game, GNU Chess, because a complete [free] system needs games too."
|GNU Go||19 February 2009||Board games, Online|
GNU Go is a Go‐playing program. It has a built‐in text based interface (shown in this article image), but it can also be used with graphical frontends like like GoGui, qGo and CGoban 1. As of May 2015 the latest stable version of GNU Go is 3.8 released on 19 February 2009.  It has been licensed under the GPLv3 since 24 October 2007 in CVS.
GNU Go also provided support for online gaming with the GGZ Gaming Zone service. Along with support for GGZ, it played on Go servers like NNGS Go, Legend of Go server hosted in Taiwan, and the WING server hosted in Japan.
|GPL Arcade Volleyball||May 25th, 2006||Arcade, Sport|
GAV: GPL Arcade Volleyball is an SDL remake of the DOS game Arcade Volleyball. The latest version of the game is 0.9.0 on May 25th, 2006. It is written in the C++ programming language. It is licensed under the GPL.
GalaxyMage is a free, open-source tactical RPG. The project began in late 2005(Registered on GNA.org on November 10, 2005) and was founded by Colin McMillen. It is licensed under GPLv2. There were several public releases up until March 2006. The last official release is version 0.3.
The project itself is now considered defunct. The official website is no longer functional. However, people still interested in seeing the game's progress can still access GalaxyMage's Gna project page.
GearHead is a futuristic roguelike game, created by Joseph Hewitt. GearHead 1 is the first roguelike to explore the world of "mecha" (giant robots). Lots of futuristic jobs and skills (mecha pilot, medic, etc.) are available, as well as piloting those mecha. A sequel, creatively named GearHead 2, is in the making. It is licensed under the LGPL.
|Gilbert and the doors||2018-08-20||Side-scrolling games||
Gilbert and the doors is a 2D platform game, written in C language/SDL1.2. This is simple, but nice to play. The game contains 22 levels with an evolutive difficulty. Source code ready for Windows and Linux platforms.
glParchis is an implementation the popular Parchis game, which is played with a dice and 4 pawns per player. Players have to move their pawns out of their nest, around the whole board, into the destination of the player's color.
Globulation 2 is a RTS game with an unusual gameplay design. The source and media are licensed under the GPL. The latest release of the game is 0.9.4.1 released on March 25th, 2009. It is programmed in C++. It uses the SDL and Boost libraries.
|Gnome Hearts||July 24th, 2008||Card game|
|Go Ollie!||no image||Platformer|
Go Ollie! is a mouse controlled platformer about an earth worm.
|Goblin Camp||2012-07-15||City building game, Roguelike game, Economic simulation game, Real-time strategy game|
Goblin Camp is a citybuilder roguelike game with economy and strategy elements released under the GPLv3. It is inspired by various and notorious games like Anno 1404, Dwarf Fortress and Dungeon Keeper.
|Goblin Hack||2009-03-24||RPG, Roguelike||
Goblin Hack is a real-time roguelike game with flashily colored ASCII art. It uses the SDL library and is programmed in the C++ programming language. The game is licensed under the GPLv2. The latest version of the game is 1.18 released on March 8th, 2008.
Gottet is a tetris-like game written by Graeme Gott. The latest version of the game is 1.1.1 released on January 25th, 2015. It is licensed under the GPL. It is written with the Qt library. The game's website features an optional tipping section near the downloads, as a pay what you want model.
|Gusanos||January 31, 2006||Shooter|
GUSANOS is a Liero clone that is licensed under the GPL. The latest release of the game is 0.9c on January 31st, 2006.
|Harris||2016-11-17||Turn-based strategy games|
The game objective of Harris is to destroy Nazi Germany by launching bombing raids. Harris is a turn based strategy game.
Hase is an open source (GPL) gravity based artillery shooter. It is similar to Worms, Hedgewars or artillery, but the gravity force and direction depends on the mass nearby. It is optimized for mobile game consoles like the GP2X, Open Pandora or GCW Zero, so it doesn't make use of the mouse even on the PC. Hase features:
Hedgewars is a turn-based artillery game featuring fighting hedgehogs. The player has to equip their team of hedgehogs with a choice of numerous silly weapons like hellish hand grenades, homing bees or melon bombs in order to combat the enemy.
|Help Hannah's Horse||2008-03-29||Arcade, action, child-oriented|
|Hero of Allacrost||2015-06-30||RPG|
The team's official description of the game is as follows:
The game will be released in modules, rather than waiting until the entire game is finished to make a release. Once a new module is released, players can download it and install it, which will make more content available for the player to continue the game from where they last saved. Each Allacrost release will contain a new chapter of the story. Each section is released when it is completely finished.
|Heroes of Wesnoth||2009-09-03||RPG||
Heroes of Wesnoth is a RPG, written by Jon Ander, and set in the universe of Battle for Wesnoth. The last version of the game is 0.1.2, released on September 3th, 2009. It is licensed under the GPLv3.  It is written in the C++ programming language and uses the SDL library.
|Heroine Dusk||2017-7-11||Role-playing game|
Heroine Dusk is a turn-based dungeon crawler browser game featuring random encounters. Play occurs from a first-person perspective rendered by grid point, similar to old school games like The Bard's Tale or Dungeon Master. It was created by Clint Bellanger, author of FLARE, for the OneGameAMonth contest for April 2013. It is also the basis for Ascension Adventure (link).
Hetris: An exploration of literate programming in Haskell is a text mode implementation of Tetris in Haskell, created by Ian Lynagh to demonstrate pretty-printing of a literate Haskell program using Haskell2LaTeX. The document produced by running Haskell2LaTeX then LaTeX is a detailed explanation of the structure and internals of the program.
Hex-a-hop is a hexagonal tiles based puzzle game written by Tom Beaumont. The player controls a girl, who has to destroy all green tiles by jumping on them. In addition to the green tiles there are plenty of other kind of tiles with varying functionality gradually introduced.
Hexoshi is an action-adventure maze game similar in style to the original Metroid series. The game consists of exploring the world and gathering "artifacts" scattered around, fighting enemies along the way.
Hnefatafl is an implementation of a Norse board game. It supports Hnefatafl 11x11, 13x13, and Tablut completely. Other regional variants are partly supported by the provided using rulesets.
Holtz is a collection of board games that can be played against the computer or online against other players. Holtz supports the games Zèrtz, Dvonn, Relax and Bloks.
|Howitzer Skirmish||Please add the Gameinfo template to the article||
|Imperium: Sticks||2008-06-12||Real-time strategy game||
Imperium: Sticks is a real-time strategy game being programmed in C by Caerwyn, and licensed under the GPL. Artwork is done by Iwan Gabovitch. Part of the game's media is licensed under the WTFPL. The latest version is 0.1.5 - released on June 12, 2008.
|Infinite Tux||2019-02-26||Platform game||
Infinite Tux is a 2D platformer game inspired by Infinite Mario. The game is procedurally generated every time it is replayed so you always play a different game.
All of the original Nintendo assets have been replaced with free and open assets.
|Infon Battle Arena||2006-10-01||Life simulation, RTS, Programming|
Infon Battle Arena is a real-time multiplayer programming game written by Florian Wesch. You control your creatures using the Lua programming language and let them compete for food and survival against other players. The game is client/server based and is playable over the internet. Players can upload code at any moment to update their code or fix bugs while the game is running in realtime. It is written in the C and Lua programming language using the SDL library. The latest release is 265 released on February 25th, 2008. The media and the source code are both licensed under the GPL.
|Interstate Outlaws||no image||August 15, 2007|
Interstate Outlaws is a vehicle combat game. The latest version of the game is alpha 0.1.3b, released on August 15, 2007. This game is licensed under the GPL. It uses the engine Crystal Space, along with CEL and ODE.
Intricacy is a multiplayer lock-picking puzzle game, in which players design locks and try to pick the locks devised by others.
|Irrlamb||2019-05-10||Platform, puzzle, physics simulation|
irrlamb is a platform game, in which the player moves a ball through a 3D terrain to find all the orbs. It is being developed by Alan Witkowski and is based on the Irrlicht Engine. irrlamb is licensed under the third version of the GPL. The latest version of the game is 1.0.1 released on May 10th, 2019.
Isleward is an MMORPG in the style of a roguelike, with pixel art graphics. It claims to be the world's only open source, moddable, roguelike MMO. On character creation, players may select one of three spirits: bear, owl, and lynx. Bear spirits gain 1 strength on leveling up, owl spirits gain 1 intellect on leveling up, and lynx spirits gain 1 dexterity on leveling up.
JSkat is an implementation of the German card game Skat and variations thereof. Players can compete with fellow humans or with the computer. JSkat is implemented in Java.
JSoko is a sokobon style puzzle game. It includes an automatic solver and supports different skins.
Jamp is a physics puzzle game. The player controls a squirrel character inside a wheel-like cage, using contraptions and the laws of physics to move the character to the destination.
Jamp was created by a Swiss pupil.
|Java Classic Role Playing Game||2010-06-07||RPG|
Java Classic Role Playing Game (JCRPG) is a 3D RPG and framework written in Java the programming language. The game is licensed under the GNU LGPL v3.0. Media is licensed under free licenses (GPL,CC, PD, etc)
The latest version is svn svn20100525 released on May 25th, 2010.
Javelin is a free open-source single-player role-playing game written in Java that uses d20 as the rule system – also found in Dungeons and Dragons (versions 3.0 and 3.5) and its successor Pathfinder. It draws heavy inspiration from many other video games, from Jagged Alliance and Dungeon Crawl Stone Soup to Pokémon and the Final Fantasy series.
KMines is a mostly classical minesweeper puzzle game from the KDEGames division of the KDE Project. There are three preset levels and a custom one. The last one allows the player to adjust width and height of the playing field, and the number of mines.
Kingdoms is a strategy game in which the player builds an empire and leads his nation throughout history. It is inspired by concepts from Civilization.
Knights is a multiplayer game in which knights solve quests in dungeons.
Kuklomenos is an abstract shoot-em-up game, with minimalistic graphics and short game-length.
Note that the COPYING file indicates that the game uses a non-free sound from freesound.org, but this is out of date - the relevant sound file is now released under CC-BY.
|L'Abbaye des Morts||2016-09-23||Side-scrolling Adventure|
L'Abbaye des Morts is a 2D exploration platformer made by Locomalito, released in 2010. Its code was rewritten and open sourced by MoonWatcher, spawning ports to many platforms such as GNU/Linux, FreeBSD, Wii, ZX Spectrum, C64, PSP, XBox, Nintendo 3DS and Pokitto. Because the media is released under CC-BY license, the game is completely libre.
The game features two sets of graphics to choose from – an oldschool, low color one, and a new, high-color refined set.
LBreakout2 is a breakout clone written by Michael Speck and is the successor to LBreakout. It uses the SDL library. The latest version of the game is 2.6.5 on October 17th, 2015. It won the No Starch Press SDL Game Contest. It is licensed under the terms of the GPLv2.
There's a remake of the game with improved, LBreakoutHD.
LBreakoutHD is a breakout clone written by Michael Speck and is a remake of LBreakout2 with improved graphics. The gameplay of LBreakout2 is (mostly) preserved and it includes all levels from LBreakout2.
If one had to categorize LambdaRogue to be either a "hack"-game or a "band"-game judging by dungeon generation, it would clearly fall into the "band"-category: Like in Angband and other *bands, standard dungeon levels are randomly generated every time a staircase is used and the player will never encounter the same dungeon level twice.
|LegacyClone||June 11th, 2008||City building game, Economic, Online|
LegacyClone is an online city and economic simulator. It allow players in a persistent world to play as mayors/presidents, build factories and trade goods with other players. The latest release of the game is 0.1.4 on June 11th, 2008. It is written in the Java programming language using the Swing library. The developers are Mr Matt, Daou, and SnapDragon(real names unknown).
|LevelHead||no image||spatial memory puzzle|
levelHead is a spatial memory game which uses the concept of "augmented reality" (or is it "augmented virtuality"?) for its input.
The player holds a solid plastic cube with patterns on its sides before a camera, and controls the game world by tilting the cube.
|Liberal Crime Squad||September 4th, 2012|
|Liberation Circuit||2017-04-15||Real Time Strategy Programming|
Liberation Circuit is a real-time strategy game about escaping from a hostile computer system, by designing and building units sufficient to the task. Unit AIs are written in a simple C-like language; in an optional programming aspect of the game, the player may fully customise the AI of the units they build using an integrated compiler and editor.
|LifeFLOW3D||2018-03-29||Educational||LifeFLOW3D Digitarium lets you play with moving software creatures, as they explore their lush environments.
In LifeFLOW3D, you interact with various geometric systems that respond to your avatar. Kids learn about space and time, and get a feeling for exciting ways to play with colors and shapes. It is released under the GPL 3.0 license.
Limbs Off is the flagship in plaimi's phun-fysics genre, in which they strive to reproduce complex real life physics, but take certain liberties whenever they feel it will add to the entertainment of the games. Limbs Off specifically is a fighting game that takes place in space. Right now there is only one planet and three characters, but plaimi want to implement several planets as well as inter-planetary travel via cannons, amongst other features.
The characters are "limbless", and consist of a head, body, two feets and hands. As of yet, the only way of "fighting" is running into each other. When the characters hit each other, their mass is decreased up to a point where their body parts are unlinked and the characters effectively become space junk.
Limbs Off does not come with sprites or sounds. Instead, plaimi want to hack the game to load art from a data directory, so that users can install their own art. As of yet it only supports this with character sprites, as the game is at a very early alpha stage. It "went public" on the 24th of September in 2011, on github.
The game runs on relatively modest hardware, and has been compiled and run successfully on most modern UNIX-based operating systems.
|LinCity-NG||November 4th, 2007, January 25th, 2009||City building game|
LinCity-NG is a city building game that is the successor to and fork of LinCity. It is being developed by members of the Happypenguin's Game of the Month project.The stable latest version of the game is 1.1.2 released on November 4, 2007. The latest unstable release is 2.0 released on January 25th, 2009. It used the SDL library.
|Lincity||August 13th, 2004||
Lincity is a city building simulation game. The latest stable version is Version 1.12.1, released on August 13, 2004. It is originally written by I J Peters and licensed under the GPL. It is written in the C programming language.
|Liquid War 6||2015-05-07||Action games|
Liquid War is an action game that involves blob of liquids written by Christian Mauduit. Liquid War 6 is a complete rewrite of Liquid War as a part of the GNU Project. It is licensed under the GPLv2. The latest version of the game is 0.0.9beta released in August 2010.
LordsAWar! is a GPL, turn-based strategy game which is intended to be similar to Warlords II. It was created from the original C++ code base of the old Freelords project. Freelords has subsequently been restarted and has switched to Java. LordsAWar! was written by Ben Asselstine.
|Luola||February 05th, 2006||Arcade game|
M.A.R.S., a ridiculous shooter. In a far-future colonised galaxy, a GREAT WAR is raging between nameless adversaries. In one of several game modes, two opposing teams are fighting in a gravitational 2D space with a few planets, including their homes. Translations, numerous weapons and AI bots are implemented. Two players can join in the game on the same computer, network play was planned for a later version. The game's visuals provide ample effects and jarring colours, including pink.
Initially, the game contained some non-free media. Hans de Goede provided a fully free version by replacing sounds and fonts, while the Hungarian symphonic metal band Obsidian Shell gave their permission to distribute the music tracks they contributed under CC-BY-SA 3.0, instead of the original CC-BY-NC-ND 3.0.
MUSoSu is a Sudoku puzzle game (generator and solver) written in the Java programming language by Marios Visvardis. It is also partially themeable and platform independent. It is licensed under the GPL.
|Mah-Jong||January 6th, 2014||Gambling|
Mah-Jong is a client‐server set of programs for playing Mah-Jong written in the C programming language by Julian Bradfield, in the Chinese Classical style, against other users (locally or over a network), against programmed players, or both.
Though the game is licensed under the GPL, the author requests that any derived works respect the protocol definition, and that incompatible modifications are not distributed under the same name.
|Maniadrive||August 21th, 2006||Racing|
Maniadrive is a racing clone of Trackmania written by an author with the pseudonym xfennec. The latest version of the game is 1.2 released on August 21st, 2006. The code is licensed under the GPL, while some of the media are also under the GPL but some are licensed under CC-BY-SA.
Maniadrive is flagship game of Raydium 3D engine. Game contains level editor and there are community forums where homemade tracks are showed.
The music is released under the non-free CC BY-NC-SA license, but a fully-free version, with non-free music removed, exists. See Fedora repository for freed packages with replacement soundtrack.
Marble Marcher is a 3D game showcasing a fully ray marched graphics and making use of fractals and a fractal collision engine, with 24 levels to unlock. Due to the nature of the rendering technique it is very demanding on the graphics card and may require a modern dedicated GPU.
In the game the player controls a ball rolling on the surface of various 3D fractals, with the goal of getting to the finish zone as quickly as possible, in a fashion similar to for example Neverball.
From version 1.1.1 there are cheats available once all levels have been finished. These include a free 3D view and fractal parameter modification so that the game can be used as a real-time 3D fractal exploration tool.
From version 1.1 the development has been continued by the community, under the name Marble Marcher: Community Edition. This version fixes bugs and adds new features such as better rendering or level editor.
|Me and My Shadow||2018-11-03||Platform, Puzzle||
Me and My Shadow is a platform and puzzle game in which the player's shadow plays an important role. The game uses only monochrome colours, fitting the shadow-theme. There is set of tutorial levels which explain the controls, tactics and puzzles elements.
|MegaGlest||2017-03-09||Real-time Strategy, (RTS)|
|MegaZeux||Please add the Gameinfo template to the article||MegaZeux is a free software game and game creation software styled after Epic Games' classic title ZZT by Tim Sweeny (later developer of the Unreal Engine).
The program was first started in late 1994 by Gregory Janson, who formed his own but now defunct company, Software Visions. Similar to the original ZZT, MZX was first released as shareware whilst world editor portion of the program was included entirely for free, which allowed third parties to create their own game worlds without needing to register the game.
MZX is officially supported on Windows 95 or later, Linux, Mac OS X, Wii, GP2X, PSP, and the DS. It is also unofficially available for AmigaOS 4, OpenBSD, FreeBSD, OpenSolaris, Haiku and Android.
|Memonix||July 13th, 2007||Puzzle, memory||
The latest version is 1.6_070717 (2007-07-17) for Art and 1.6_080519 (2008-05-19) for Code.
|Micropolis||2013-12-01||City building game|
Micropolis is a free city building game that is based on the fork of the Unix port of the game SimCity. The game was released under the GPLv3 by the company EA for the OLPC project. It is licensed under the GPLv3.
Moagg stands for “mother of all gravity games”. It is a game that involves gravity. The latest version of the game is 1.8 released in 2005 and licensed under the GPL. It is developed using the C++ programming language and SDL.
Moagg is not being developed anymore; a Java port is being developed under the name of Moagg2.
|Moagg2||December 6th, 2008||Arcade|
Moagg2 (mother of all gravity games) is a Java port of Moagg by the same author, Bernhard Trummer. The latest version of the game is 1.95b on December 6th, 2008. It is licensed under the GPL. It used the library Mozilla Rhino.
|Mtp Target||Online multiplayer|
Mtp Target is an online multiplayer action game.
Naev is a 2D space top-down shooting and trading game primarily developed by Edgar "Bobbens" Simo. It requires SDL, OpenGL, and OpenAL. The source code is licensed under the GPLv3. The project was inspired by the proprietary game Escape Velocity.
|NetPanzer||February 20th, 2010||Online||Due to the limitation of MediaWiki, the title is incorrect. The title should be netPanzer.
netPanzer is a tactical online multiplayer war game. It was first written by Pyrosoft Inc. In 2002 netPanzer was licensed under the GPL, making the game free software. As of 2010-03-27, the latest version of the game is 0.8.3 released on February 20th, 2010. It is licensed in its entirety under the GPLv2.
Neverball is a game of skill in which the player guides a ball through various obstacle courses by tilting the entire level. The game, including the media, is licensed under the GPL. There is a game based on Neverball, called Neverputt.
|Nexuiz||1st October 2009||First person shooter|
NOTE: This article refers to the original libre game “Nexuiz” created by AlienTrap from 2005. There's also a proprietary game called “Nexuiz” by IllFonic. This article is concerned with the libre game.
|Nikwi||August 23, 2006||Platform|
Nikwi is a 2D platformer where the player's goal is to collect sweets and avoid the traps and enemies.
Nova Pinball is a pinball game made with the LÖVE engine. You must perform tasks to get points. The game is space-themed.
|Numpty Physics||2012-08-31||Physics simulation, puzzle||
Numpty Physics is a drawing puzzle game, where the goal is to draw shapes on a drawing to get two given objects to touch.
O.H.R.RPG.C.E. (Official Hamster Republic Role Playing Game Construction Engine) is a GPL licensed  cross-platform tool with which you can create your own 2D RPG game in a style similar to the classic Final Fantasy games on the NES, SNES and GBA which have so shaped the RPG genre. No programming knowledge is needed to use the program, but scripting is also available.
|OGS Mahjong||2012-09-23||Puzzle, Boardgame|
OGS Mahjong is a simple mahjong solitaire game with nice 3D graphics and relaxing soundtrack. It has been developed by the Opensource Game Studio and licensed under GPL (version 3). This game requires 3D hardware with support of OpenGL 2 or later.
There are versions for Windows and Linux.
Omega-rpg is a single player roguelike game. It was created by Laurence R. Brothers who has since placed the code under the GNU Lesser General Public License version 2, but if the license is revoked it would revert to its old license which is distributed with the Debian package. It is written in the C programming language. The latest version of the game is 0.7.1 released on August 26, 2001.
|One Hour One Life||2018-06-30||Online Multiplayer Games|
One Hour One Life is a multiplayer survival game of parenting and civilisation building.
The game is entirely free software, with everything, including the server software and all media, being released into the public domain.
Buying the game from the author is required to access the official game servers, and also provides easy access to pre-built binaries, which are regularly updated.
|One is enough||2007||arcade|
One is enough is an arcade game written by Olli Etuaho in Python using the Pygame library as a warmup for pyweek 4. It is licensed under GPLv2. The latest version of the game is Alpha 0.40 released in 2007.
Oolite is a space simulation game inspired by the game Elite. Both the source code and media are licensed under the GPL (version 2 or later). Oolite is programmed in the Objective-C programming language and uses OpenGL. It is available for the Linux, Mac OS X, and Windows operating systems. This game requires 3D hardware acceleration.
|OpenAlchemist||October 12th, 2008||Puzzle||
OpenAlchemist is a falling block puzzle game created in C++. The source code is licensed under the GPLv2++ and the media is licensed under the CC-BY-SA. The latest version of the game is 0.3 released on October 12th, 2008. It uses the ClanLib library. It was made as a clone of a web flash game called NaturalChimie.
OpenArena is a FPS game intended to be a free replacement for the proprietary Quake III Arena. Both the media and the game are licensed under the GPLv2.. The OpenArena project was established on August 19, 2005, the day after the id Tech 3 GPL source code release. A "mission pack" add-on is also planned, to take advantage of the GPL'd Quake III: Team Arena source code.
|OpenCity||2015-03-15||City building game|
OpenCity is a 3D city building game started in 2003 by Duong-Khang Nguyen, licensed under the GPL.. It's coded in C++, uses the OpenGL and SDL libraries and the OGRE rendering engine. While it's similar to SimCity, it is not intended to be a direct clone.
The last stable release, 0.0.6.5, was released on March 15th, 2015.
|OpenMortal||June 15th, 2006||Arcade|
OpenMortal is a fighting game and is a parody of the proprietary game Mortal Kombat. It is licensed under the GPL. The latest version of the game is 0.7.1 released on June 15th, 2006. It is written in the Perl and C++ programming languages.
Instructions are provided on how to create new, realistic characters, so players and their friends could serve as actors for the game. As of 2008-05-30, there were 24 characters at http://openmortal.sourceforge.net/cgi-bin/characters.cgi.
The game is not available in Debian, because its would-be maintainer found that it seemed dead since 2006, and thus he would have to deal with all the potential bug reports.
|Open Quartz||August 1st, 2004|
Open Quartz is an implementation of the GPL Quake source, which includes data also under the GNU General Public License. The latest version of Open Quartz is 2004.08.01.
|Openfrag||May 20th, 2008||FPS||
Openfrag is a GPL medieval-themed open-source FPS currently in development written in C++ and Lua.The latest version of the game is the Demo 0.5 released on May 20th, 2008. Several Openfrag developers, and the Openfrag leader, have announced that they would be leaving the Openfrag project, however, the leader of the Bullets Project has said that the latter would like to continue the Openfrag Project.
|Orbit-Hopper||July 19, 2009||Platform, racing|
Orbit-Hopper is a clone of the video game SkyRoads (1993), a 3D racing and platform game. It provides full 3D graphics, a level editor, and multiplayer with split-screen.
|Osgg||January 01 st, 2009||Arcade|
osgg is a Side-scroller/arcade lunar-lander-like game. It is written by Jimmy Christensen and licensed under the GPLv3. The latest version of the game is 0.9 released on January 01st, 2009. It is written in the C++ programming language using the SDL library.
|PSY PONG 3D||no image||January 2nd, 2009.||pong|
PSY PONG 3D is a 3D pong clone.
Pacewar is a simple fighting game between two teams of ships. A team wins when it defeats the opposing team a certain number of times more than it is defeated by the opposing team. As a team gets closer to winning, it loses ships.
Pacman is a pacman clone and very close to the original from Namco. One of the main goals of this clone is a SDL Application with very little use of CPU power. It is licensed under the terms of the GPL version 2 (or any later version).
Palapeli is a jigsaw puzzle game from the KDEGames collection.
Pathogen Warrior is a simple game about matching a pathogen molecular structure on a hexagonal grid. It was originally written for Ludum Dare in 2004. It is GNU GPL v2 licensed. This game does not require 3D hardware acceleration.
|Pathological||July 17, 2003|
Pathological is a puzzle game similar to “Logical” by Rainbow Arts, written by John-Paul Gignac who was inspired by Frozen Bubble. It is written in the Python programming language using the Pygame library. It is licensed under the GPL. The latest version of the game is 1.1.3 released on July 17, 2003. This game does not require 3D hardware acceleration.
Someone criticized the game and its inclusion in the "lernu!" website, because it depicts death/murder.
Penguin Command is a game where you control 3 defensive turrets and try to intercept missiles and bombs which threaten your cities. It is GNU GPL licensed. This game does not require 3D hardware acceleration.