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Free Open Source Games

Games on this list were included based on recommendations, if you'd like to a game added to this list, please post it on the sticky of /f/Games. For a more comprehensive list, please see this Wikipedia page.

  1. Adventure/RPG

  2. Arcade/Casual

  3. Art

  4. Artillery

  5. Board/Card

  6. City Builder/Tycoon

  7. Fight

  8. Flight

  9. FPS/TPS

  10. Infinite runner

  11. Metroidvania games

  12. MMORPG

  13. Music

  14. Physics based

  15. Puzzle

  16. Racing

  17. Roguelikes

  18. RPG

  19. Side-Scroller/Platformer

  20. Programming

  21. Puzzle

  22. Puzzle-platformer games

  23. Racing/Driving

  24. Sandbox/Voxel

  25. Sealth games

  26. Shoot 'em up

  27. Social simulation

  28. Space Combat/Sim

  29. Sport game

  30. Strategy/Tactics

  31. Vehicular combat

  32. Walking simulator

  33. Uncategorized

Adventure/RPG

  • Ardentryst - Action/RPG sidescroller.
  • Beneath a Steel Sky - Classic adventure game with excellent artwork and voice talent. Should be available in the Ubuntu repos
  • Egoboo - Action-adventure rogue-lite game
  • Eldevin - F2P Runescape clone with a distinct charm
  • Epic Inventor - Side-scrolling, Action RPG inspired by Terraria.
  • Flare - A surprisingly in-depth and polished isometric RPG
  • FreedroidRPG - Diablo-style ARPG.
  • Lugaru - Turner, is an anthropomorphic rebel bunny rabbit with impressive combat skills. In his quest to find those responsible for slaughtering his village.
  • Myst Online: Uru Live - MMO adventure game in where players interact with others to solve puzzles and advance the story.
  • ScummVM's Freeware Games - Some fantastic point'n'click games here, my favourite probably being Dreamweb
  • Solarus Games - Solarus is a game engine for making Zelda-like games, but there are many completed games available on their website, and also community made games
  • Summoning Wars - Action roleplaying game for singleplayer or up to 8 players in multiplayer.

Arcade/Casual

Art

  • Hummingbird - Infinite procedural musical exploration game.
  • Passage - A simple experimental side scroller game intended as an abstract metaphor for the human condition.

Artillery

Board/Card

City Builder/Tycoon

  • OpenTTD (GNU/Linux, Windows & Mac) - a transport simulation game based upon the popular game Transport Tycoon Deluxe, written by Chris Sawyer.
  • OpenRCT2 (GNU/Linux, Windows & Mac) - An open source reverse engineering of Rollercoaster Tycoon 2. Requires assets from the original game, acquirable here

Fight

  • OpenOMF - Remake of One Must Fall 2097.

Flight

FPS/TPS

  • Alien Arena - Retro Sci-Fi Online FPS
  • Army Men III
  • AssaultCube Reloaded
  • Cube 2 - Quake-like Arena online FPS with multiple game modes
  • ET Legacy - Wolfenstein: Enemey Territory for modern systems
  • Digital Paint: Paintball 2 and Digital Paint: Paintball 3 - Fast-paced first-person shooters.
  • FreeCS - Reimplementation of Counter-Strike 1.5.
  • Freedoom - The Freedoom project aims to create a complete free content game based on the Doom engine.
  • Nexuiz - Multiplayer first-person shooter.
  • OpenArena - Online arena FPS using the id tech engine
  • OpenSpades - Clone of Ace of Spades 0.75, featuring fully destructible terrain and plenty of game modes (including the well-known Capture the Flag).
  • Quetoo - Multiplayer first person shooter based on id Tech2.
  • Red Eclipse (GNU/Linux, BSD, Windows & Mac) - a free online arena shooter with parkour.
  • Termulous - Asymmetric team-based RTS/FPS Hybrid with aliens! (Source code)
  • Übergame - Realism like, multi-purpose, multiplayer, casual, first-person-shooter game.
  • Unvanquished - First-person strategy shooter, pitting technologically advanced human soldiers against hordes of highly adaptable aliens.
  • Urban Terror - Fast paced online FPS reminiscent of Counter-Strike
  • Warsow (GNU/Linux, Windows & Mac) - a fast-paced FPS in a futuristic cartoonish world.
  • Xonotic (GNU/Linux, BSD, Windows & Mac) - a free online shooter, based on Quake.

Infinite runner

Metroidvania games

  • Birdsong - Game about a bird that is about to leave the nest.
  • Meteorite - Lowres FPS, inspired by Metroid Prime.
  • The Diasporic Crypt - Libre game inspired by Castlevania, where you play a vampire who moves around in a portable teleporting catacombs underground.

MMORPG

Music

  • Auto Rhythm - Rhythm game with auto generated note maps.
  • Frets on Fire X - Highly customizable rhythm game supporting many modes of guitar, bass, drum, and vocal gameplay for up to four players.
  • osu! (Source code) and McOsu - Based on the gameplay of a variety of popular commercial rhythm games.
  • Performous - Karaoke, band games and dancing in the same package.
  • StepMania - Advanced cross-platform rhythm game.
  • Turnt Ninja - Fast-paced rhythm game that uses your own music.
  • UltraStar Deluxe - Clone of SingStar.

Physics based

  • CaveExpress - 2D platformer with physics-based gameplay.
  • Golems - 3D physics simulator.
  • Gravity Box - Puzzle platformer where you have to use bullet's blast to push towards the finish points.
  • Neverball - Puzzle game inspired by Super Monkey Ball.
  • Nikki and the Robots - Physics platformer.
  • OpenGOO - Clone of the physics based puzzle / construction game "World of Goo".
  • Rigs of Rods - Vehicle simulator based on soft-body physics.
  • Safety Blanket - Creepy blanket simulator.
  • The Powder Toy - Physics sandbox game, which simulates air pressure and velocity, heat, gravity and a countless number of interactions between different substances.
  • XMoto - 2D motocross platform game.

Puzzle

Racing

  • Speed Dreams - Realistic racing sim
  • SuperTuxCart - Open-source clone of the Mario Cart games (Not suitable for low-end systems)
  • Yorg - A top-down racer in the Micro Machine's style.

Roguelikes

RPG

  • Andor's Trail - Single-player quest-driven fantasy RPG.
  • Angband (GNU/Linux, Windows, Mac & Android) - a single-player dungeon exploration game in the universe of JRR Tolkien.
  • Cataclysm DDA - Cataclysm: Dark Days Ahead is a turn-based survival game set in a post-apocalyptic world
  • Crossfire - Cooperative multiplayer graphical RPG and adventure game.
  • Erebus - Classic point-n-click style RPG.
  • GearHead - Mecha roguelike.
  • Red Rogue - Sidescrolling platformer-roguelite with optional realtime movement.
  • Shattered Pixel Dungeon (Android) - a traditional roguelike game with pixel-art graphics and simple interface.
  • Star Ruler 2 - Explore, expand, exploit and exterminate your way to become the ruler of the Galaxy.
  • Tuxemon - Clone of Pokémon.

Side-Scroller/Platformer

Programming

  • Robocode - Programming game, where the goal is to develop a robot battle tank to battle against other tanks in Java or .NET.

Puzzle

Puzzle-platformer games

Racing/Driving

Sandbox/Voxel

Sealth games

  • Art Treachery - Stealthy art heist game.
  • The Dark Mod - Fan-made spin-off the the fantastic Thief series (Not suitable for low-end systems)

Shoot 'em up

  • Bloodworks - Top-down survival action game where you fight against an endless waves of monsters.
  • C-Dogs SDL - Clone of the shoot 'em up C-Dogs.
  • Chromium B.S.U. - Fast paced, arcade-style, top-scrolling space shooter.
  • Dave Gnukem - Retro-style 2D scrolling platform shooter, inspired by and similar to Duke Nukem 1.
  • Friking Shark - Remake of the shoot 'em up game Flying Shark.
  • Gang Garrison 2 - Multiplayer 'demake' of Team Fortress 2.
  • Galaxy Forces V2 - 2D multiplayer space shooter, inspired by the Amiga classic Gravity Force.
  • heXon - Twin-stick-shooter for up to four players
  • Lisparuga - 2D shoot-em-up game inspired by Ikaruga. (GNU/Linux systems only)
  • M.A.R.S. - 2D space shooter.
  • Maelstrom - Clone of Asteroids
  • NightHawk - Clone of Paradroid.
  • Relic Hunters Zero - Online cooperative shooter/RPG. Source code
  • Torrega Race - Simple space game inspired by Omega Race.
  • Violetland - Cross-platform game similar to Crimsonland.
  • Watch out for Snakes - Short low poly top down retro arcade shooter.
  • Witch Blast - Roguelite dungeon crawl shooter heavily inspired from Binding Of Isaac.

Social simulation

  • Cart Life - Simulation game in which the player controls one of three street vendors, and attempts to run their shop whilst looking after their health, interests, and families. Source code
  • Coming Out Simulator 2014 - Interactive game intended to help LGBT youth to understand their sexuality.
  • Our Personal Space - Marriage survival sim set on a space colony in the near future.
  • Two Interviewees - Short visual novel about the gender gap.

Space Combat/Sim

  • Antares - Tactical space-combat game, combining elements of both arcade shooters and real-time strategy games.
  • Bridge Command - An interactive ship simulator.
  • EmptyEpsilon - A spaceship bridge simulator game
  • Endless Sky - 2D space trading and combat game similar to the classic Escape Velocity series
  • Naev - open-source game about space exploration, trade and combat
  • Oolite - Well done Elite remake, with plentiful mod support.
  • Pioneer - a remake of the sequel to Elite, Frontier.
  • The Pandoran War - 2D mission-based space shooter.
  • Ur-Quan Masters - Updated version of Star Control II. Be sure to download the Voice Pack! (Alternative HD version available here)
  • Vega Strike - Open Source 3D Action-Space-Sim

Sport game

  • Bygfoot - Football/soccer management game.
  • Classic 8-Ball Pool - Pool game written in JS and HTML5.
  • FooBillard - OpenGL-based billiards simulation game.
  • Goal Rush - Fast paced arcade game where two-robots team will face each other to score the maximum of goals during short matchs.
  • YSoccer - Retro style, multi-platform soccer game.

Strategy/Tactics

Vehicular combat

Walking simulator

Uncategorized


Source code

Games on this list were included based on recommendations, if you'd like to a game added to this list, please post it on the sticky of /f/Games. For a more comprehensive list, [please see this Wikipedia page](https://en.wikipedia.org/wiki/List_of_open-source_video_games).

# Adventure/RPG

* [Ardentryst](https://sourceforge.net/projects/ardentryst/) - Action/RPG sidescroller.
* [Beneath a Steel Sky](https://www.gog.com/game/beneath_a_steel_sky) - Classic adventure game with excellent artwork and voice talent. Should be available in the Ubuntu repos
* [Egoboo](http://egoboo.sourceforge.net/) - Action-adventure rogue-lite game
* [Eldevin](https://www.eldevin.com/) - F2P Runescape clone with a distinct charm
* [Epic Inventor](https://github.com/BlkStormy/epic-inventor) - Side-scrolling, Action RPG inspired by Terraria.
* [Flare](http://flarerpg.org/) - A surprisingly in-depth and polished isometric RPG
* [FreedroidRPG](http://www.freedroid.org/) - Diablo-style ARPG.
* [Lugaru](http://www.wolfire.com/lugaru) - Turner, is an anthropomorphic rebel bunny rabbit with impressive combat skills. In his quest to find those responsible for slaughtering his village.
* [Myst Online: Uru Live](https://www.mystonline.com/) - MMO adventure game in where players interact with others to solve puzzles and advance the story.
* [ScummVM's Freeware Games](https://www.scummvm.org/games) - Some fantastic point'n'click games here, my favourite probably being Dreamweb
* [Solarus Games](http://www.solarus-games.org/games/solarus-team/) - Solarus is a game engine for making Zelda-like games, but there are many completed games available on their website, and also [community made games](http://www.solarus-games.org/games/community/)
* [Summoning Wars](https://sourceforge.net/projects/sumwars/) - Action roleplaying game for singleplayer or up to 8 players in multiplayer.


# Arcade/Casual


* [Altitude](https://store.steampowered.com/app/41300/Altitude/) - 2D Online plane combat
* [Chromium-BSU](http://chromium-bsu.sourceforge.net/) - Top-down arcade Shmup
* [Deflector](https://mandarin.itch.io/deflector) - Retro style, ball bouncing, arcade game.
* [Kobo Deluxe](http://olofson.net/kobodl/) - 8-way scrolling shooter
* [LBreakoutHD](http://lgames.sourceforge.net/LBreakoutHD/) - Open-source breakout clones.
* [OpenTyrian](https://bitbucket.org/opentyrian/opentyrian/wiki/Home) - The famous Shmup
* [SSVOpenHexagon](http://vittorioromeo.info/projects.html) - Open-source clone of Super Hexagon. [Source code](https://github.com/SuperV1234/SSVOpenHexagon) for packagers
* [Super Tux Party](https://anti.itch.io/super-tux-party) - Party game that is meant to replicate the feel of games such as Mario Party. ([Source code](https://gitlab.com/SuperTuxParty/SuperTuxParty))
* [TeeWorlds](https://store.steampowered.com/app/380840/) - Online 2D shooter
* [Witch Blast](https://dev.solus-project.com/T1335) - Open-source clone of Binding of Isaac. [Source code here](https://github.com/Cirrus-Minor/witchblast) for packgers.


# Art
* [Hummingbird](https://niall-moody.itch.io/hummingbird) - Infinite procedural musical exploration game.
* [Passage](http://hcsoftware.sourceforge.net/passage/) - A simple experimental side scroller game intended as an abstract metaphor for the human condition.


# Artillery
* [Apple Flinger](https://gitlab.com/ar-/apple-flinger) - Angry Birds-clone for Android.
* [Atomic Tanks](http://atanks.sourceforge.net/) - Multi-platform Scorched Earth clone similar to the Worms series.
* [Cat-O-Pult](http://ludumdare.com/compo/ludum-dare-36/?action=preview&uid=86196) - Castles/Worms type of a game, but in this one you use cats as your weapon of choice.
* [Gusanos](http://gusanos.sourceforge.net/) - Clone of the DOS game Liero.
* * [Hedgewars](http://www.hedgewars.org/), [Warmux](https://github.com/yeKcim/warmux) and [OpenLierox](http://www.openlierox.net/) - Clones of Worms.


# Board/Card
* [Argentum Age](http://www.argentumage.com/) - Open-source fantasy card game
* [c4](https://github.com/kenrick95/c4) - Connect Four game, with AI. [Source code](https://github.com/kenrick95/c4)
* [Desperate Gods](http://www.wolfire.com/desperate-gods) - Online board game where no rules are enforced by the computer, and all moves are performed in a shared physical space. The game itself is a dark fantasy dungeon crawl for up to four players.
* [Domination](http://yura.net/projects/domination) - Game based on the board game "Risk".
* [Lichess](https://lichess.org/) ([source code](https://github.com/lichess-org)), [Lucas Chess](https://lucaschess.pythonanywhere.com/), [3D Hartwing Chess Set](https://codepen.io/juliangarnier/full/BsIih) ([source code](https://github.com/juliangarnier/3D-Hartwig-chess-set)) and [DroidFish Android Chess App](https://github.com/peterosterlund2/droidfish) - Chess games.
* [Magarena](https://magarena.github.io/) - Single-player fantasy card game.
* [OGS Mahjong](https://www.openhub.net/p/ogs_mahjong), [Green Mahjong](http://greenmahjong.daniel-beck.org) ([source code](https://github.com/danbeck/green-mahjong)) - Games of Mahjong.
* [PokerTH](https://www.pokerth.net) - Free online poker with the best open source texas holden poker game and a great community
* [PySolFC](https://pysolfc.sourceforge.io/), [Solitaire.gg](https://github.com/KyleU/solitaire.gg), [Aisleriot](https://wiki.gnome.org/action/show/Apps/Aisleriot?action=show&redirect=Aisleriot) - Collection of solitaire games.
* [Quatter](https://luckeyproductions.itch.io/quatter)- Game of Quarto.
* [Scrabble3D](https://sourceforge.net/projects/scrabble/) - Highly customizable Scrabble game. Supports Classic Scrabble, Superscrabble and also 3D games and own boards.

# City Builder/Tycoon

* [CorsixTH](https://github.com/CorsixTH/CorsixTH) - Clone of Theme Hospital
* [Freeserf](http://jonls.dk/freeserf/) - Clone of The Settlers 1/Serf City.
* [FreeTrain](https://sourceforge.net/projects/freetrain/) - Rail and business simulation inspired by the A-Train series of games.
* [KeeperRL](https://keeperrl.com/) - Dungeon management and roguelike.
* [LinCity-NG](https://github.com/lincity-ng/lincity-ng/), [Micropolis Web](https://github.com/SimHacker/micropolis) and [3d.city](https://github.com/lo-th/3d.city) - Clones of SimCity.
* [OpenSkyscraper](http://openskyscraper.org/) - Clone of the simulation game SimTower.
- [OpenTTD](https://www.openttd.org/en/) (GNU/Linux, Windows & Mac) - a transport simulation game based upon the popular game Transport Tycoon Deluxe, written by Chris Sawyer.
- [OpenRCT2](https://openrct2.io/) (GNU/Linux, Windows & Mac) - An open source reverse engineering of Rollercoaster Tycoon 2. Requires assets from the original game, acquirable [here](http://cdn.limetric.com/games/openrct2/misc/RollerCoasterTycoon2TTP_EN.zip)
* [Scorched 3D](http://www.scorched3d.co.uk/) - Simple turn-based or real-time artillery strategy game
* [Simutrans](https://www.simutrans.com/en/) - Open-source transportation simulator clone.
* [The Founder](http://thefounder.biz/) - Dystopian business-simulator. [Source code](https://github.com/frnsys/the_founder)
* [Unknown Horizons](http://unknown-horizons.org/) - Village builder inspired by the Anno series
* [Widelands](https://wl.widelands.org/) - Polished Settlers clone


# Fight

* [OpenOMF](http://www.openomf.org/) - Remake of One Must Fall 2097.


# Flight

* [FlightGear](http://home.flightgear.org/) - Flight simulator.
* [Triplane Classic](https://github.com/vranki/triplane) - Sidescrolling dogfighting flying game


# FPS/TPS

* [Alien Arena](http://red.planetarena.org/) - Retro Sci-Fi Online FPS
* [Army Men III](https://sourceforge.net/projects/armymen3/)
* [AssaultCube Reloaded](https://acr.victorz.ca/)
* [Cube 2](http://sauerbraten.org/) - Quake-like Arena online FPS with multiple game modes
* [ET Legacy](https://www.etlegacy.com/) - Wolfenstein: Enemey Territory for modern systems
* [Digital Paint: Paintball 2](https://sourceforge.net/projects/paintball2/) and [Digital Paint: Paintball 3](https://sourceforge.net/projects/digitalpaintbal/) - Fast-paced first-person shooters.
* [FreeCS](https://sourceforge.net/projects/freecs-1-5/) - Reimplementation of Counter-Strike 1.5.
* [Freedoom](https://freedoom.github.io) - The Freedoom project aims to create a complete free content game based on the Doom engine.
* [Nexuiz](https://sourceforge.net/projects/nexuiz/) - Multiplayer first-person shooter.
* [OpenArena](http://openarena.ws/smfnews.php) - Online arena FPS using the id tech engine
* [OpenSpades](https://github.com/yvt/openspades/) - Clone of Ace of Spades 0.75, featuring fully destructible terrain and plenty of game modes (including the well-known Capture the Flag).
* [Quetoo](http://quetoo.org) - Multiplayer first person shooter based on id Tech2.
* [Red Eclipse](http://redeclipse.net) (GNU/Linux, BSD, Windows & Mac) - a free online arena shooter with parkour.
* [Termulous](http://www.tremulous.net/) - Asymmetric team-based RTS/FPS Hybrid with aliens! ([Source code](https://github.com/darklegion/tremulous))
* [Übergame](https://duion.com/games/uebergame/main) - Realism like, multi-purpose, multiplayer, casual, first-person-shooter game.
* [Unvanquished](https://www.unvanquished.net/?page_id=336) - First-person strategy shooter, pitting technologically advanced human soldiers against hordes of highly adaptable aliens.
* [Urban Terror](https://www.urbanterror.info/home/) - Fast paced online FPS reminiscent of Counter-Strike
* [Warsow](https://warsow.net/) (GNU/Linux, Windows & Mac) - a fast-paced FPS in a futuristic cartoonish world.
* [Xonotic](http://www.xonotic.org/) (GNU/Linux, BSD, Windows & Mac) - a free online shooter, based on Quake.


# Infinite runner

* [Biketris](https://vikerlane.itch.io/biketris) - Hybrid of block-stacking puzzle and endless runner.
* [Red Runner](https://bayat.itch.io/red-runner)


# Metroidvania games

* [Birdsong](http://ludumdare.com/compo/ludum-dare-31/?action=preview&uid=3479) - Game about a bird that is about to leave the nest.
* [Meteorite](https://bauxite.itch.io/meteorite) - Lowres FPS, inspired by Metroid Prime.
* [The Diasporic Crypt](https://beelzy.itch.io/the-diasporic-crypt) - Libre game inspired by Castlevania, where you play a vampire who moves around in a portable teleporting catacombs underground.


# MMORPG

* [BrowserQuest](https://github.com/mozilla/BrowserQuest)
* [Daimonin](https://www.daimonin.org/)
* [Evol Online](http://www.evolonline.org/) - 2D MMORPG. [Source code](https://gitlab.com/evol)
* [ImperiumAO](https://www.imperiumao.com.ar/en/) - [Source code](https://sourceforge.net/projects/impao/)
* [PlaneShift](https://www.planeshift.it/Source%20code) - 3D fantasy MMORPG.
* [Ryzom](https://ryzom.com/) A game where there are no classes to choose, nor force to choose a faction or guild.
* [Stendhal](https://stendhalgame.org/) - 2D MMORPG.
* [The Mana World](https://www.themanaworld.org/) - 2D MMORPG. [Source code](https://github.com/themanaworld)

# Music

* [Auto Rhythm](https://github.com/Garlov/AutoRythm) - Rhythm game with auto generated note maps.
* [Frets on Fire X](https://github.com/fofix/fofix) - Highly customizable rhythm game supporting many modes of guitar, bass, drum, and vocal gameplay for up to four players.
* [osu!](https://osu.ppy.sh/home) ([Source code](https://github.com/ppy/osu)) and [McOsu](https://github.com/McKay42/McOsu) - Based on the gameplay of a variety of popular commercial rhythm games.
* [Performous](https://performous.org/) - Karaoke, band games and dancing in the same package.
* [StepMania](https://github.com/stepmania/stepmania) - Advanced cross-platform rhythm game.
* [Turnt Ninja](https://turntninja.com/) - Fast-paced rhythm game that uses your own music.
* [UltraStar Deluxe](https://usdx.eu/) - Clone of SingStar.


# Physics based

* [CaveExpress](http://www.caveproductions.org/) - 2D platformer with physics-based gameplay.
* [Golems](http://www.golemgame.com/) - 3D physics simulator.
* [Gravity Box](https://luca1152.itch.io/gravity-box) - Puzzle platformer where you have to use bullet's blast to push towards the finish points.
* [Neverball](https://neverball.org/index.php) - Puzzle game inspired by Super Monkey Ball.
* [Nikki and the Robots](https://github.com/nikki-and-the-robots) - Physics platformer.
* [OpenGOO](https://mandarancio.github.io/OpenGOO/) - Clone of the physics based puzzle / construction game "World of Goo".
* [Rigs of Rods](https://www.rigsofrods.org/) - Vehicle simulator based on soft-body physics.
* [Safety Blanket](http://tangramgames.dk/games/safetyblanket/) - Creepy blanket simulator.
* [The Powder Toy](https://powdertoy.co.uk/) - Physics sandbox game, which simulates air pressure and velocity, heat, gravity and a countless number of interactions between different substances.
* [XMoto](https://github.com/xmoto/xmoto) - 2D motocross platform game.


# Puzzle

* [2048](http://gabrielecirulli.github.io/2048/) (Browser) - a sliding addition game.
* [Blockout2](http://www.blockout.net/blockout2/) - 3D Tetris
* [Duck Marines](http://tangramgames.dk/games/duckmarines/) - Open-source clone of Chu Chu Rocket. [Source code here](https://github.com/SimonLarsen/duckmarines) for distro packagers.
* [FloboPuyo](http://www.ios-software.com/flobopuyo-en) - Open-source clone of PuyoPuyo. [Source-code](http://www.fovea.cc/files/flobopuyo) for packagers
* [Frozen Bubble](http://www.frozen-bubble.org/home/) - Open-source clone of Bubble Bobble.
* [Not Tetris 2](http://stabyourself.net/nottetris2/) - Tetris with physics
* [Pingus](https://pingus.seul.org/) - Lemmings clone.
* [Portable Puzzle Collection](https://www.chiark.greenend.org.uk/%7Esgtatham/puzzles/) - 39 old school puzzle games


# Racing

* [Speed Dreams](http://speed-dreams.org/) - Realistic racing sim
* [SuperTuxCart](https://supertuxkart.net/Main_Page) - Open-source clone of the Mario Cart games **(Not suitable for low-end systems)**
* [Yorg](http://www.ya2.it/pages/download.html#download) - A top-down racer in the Micro Machine's style.


# Roguelikes
* [ADOM (Ancient Domains of Mystery)](https://www.adom.de/home/index.html) - Another great roguelike, with a huge world and many ways to play
* [Brogue](https://sites.google.com/site/broguegame/home) - Your goal is to travel to the 26th subterranean floor of the dungeon, retrieve the Amulet of Yendor and return with it to the surface.
* [Cataclysm: Dark Days Ahead](http://en.cataclysmdda.com/) - Unique zombie survival rogue-like, very thrilling to play.
* [DoomRL](https://drl.chaosforge.org/) - DOOM, but roguelike!
* [Dungeon Crawl Stone Soup](https://crawl.develz.org/) - A roguelike adventure to find the mystifyingly fabulous Orb of Zot.
* [Fame](https://sourceforge.net/projects/untitled-rpg/) - Fantasy roguelike game with graphics tiles, inspired mainly by ADOM.
* [NetHack](https://www.nethack.org/) - Does this need an introduction?
* [Roguebox Adventures](https://rogueboxadventures.tuxfamily.org/) - Neat little graphical rogue-like with a focus on survival and crafting. [Source code here](https://notabug.org/themightyglider/RogueBoxAdventuresMirror) for packagers
* [Tales of Maj'Eyal: Age of Ascendancy](https://te4.org/) - Ultra polished graphical roguelike with the option to save your game
* [The Endless Dungeons](https://sourceforge.net/projects/endlessdungeons/) - 8-bit style random dungeon game
* [UnReal World](http://www.unrealworld.fi/) - Crazy in-depth survival roguelike based in iron age Finland


# RPG

* [Andor's Trail](https://code.google.com/archive/p/andors-trail/) - Single-player quest-driven fantasy RPG.
* [Angband](http://rephial.org/) (GNU/Linux, Windows, Mac & Android) - a single-player dungeon exploration game in the universe of JRR Tolkien.
* [Cataclysm DDA](https://cataclysmdda.org/) - Cataclysm: Dark Days Ahead is a turn-based survival game set in a post-apocalyptic world
* [Crossfire](http://crossfire.real-time.com/) - Cooperative multiplayer graphical RPG and adventure game.
* [Erebus](http://erebusrpg.sourceforge.net/) - Classic point-n-click style RPG.
* [GearHead](https://gearhead.itch.io/gearhead-arena) - Mecha roguelike.
* [Red Rogue](http://www.redrogue.net/) - Sidescrolling platformer-roguelite with optional realtime movement.
* [Shattered Pixel Dungeon](http://www.shatteredpixel.com/) ([Android](https://f-droid.org/packages/com.shatteredpixel.shatteredpixeldungeon/)) - a traditional roguelike game with pixel-art graphics and simple interface.
* [Star Ruler 2](https://github.com/BlindMindStudios/StarRuler2-Source) - Explore, expand, exploit and exterminate your way to become the ruler of the Galaxy.
* [Tuxemon](https://www.tuxemon.org/) - Clone of Pokémon.

# Side-Scroller/Platformer
* [ativayeban](https://github.com/Nebuleon/ativayeban) and [FallingTime](https://github.com/cxong/FallingTime) - Clones of Fall Down.
* [Bard's Lesson](https://pigdev.itch.io/bard-lesson) - Platform game in which you help a bard fox in his journey to become a maestro by mastering music notation.
* [Commander Keen 4](https://davidgow.net/keen/omnispeak.html) - Classic Shareware DOS title ported to Linux
* [Fox Dash](https://foxdashgame.com/) - Side scrolling 2D platformer for Android. [Source code](https://github.com/kobaj/foxdashtwo)
* [Frogatto](https://frogatto.com/) - Platformer with great music and graphics. Should be available in the Ubuntu repos for free
* [GOAT](https://gamejolt.com/games/GOAT/342242) - An arcade game about a drunken space goat!
* [Hurrican](https://www.winterworks.de/project/hurrican/) - Inspired by the classic game Turrican. Mostly forgotten nowadays, so [you may have to compile it from here](https://sourceforge.net/p/hurrican/code/HEAD/tree/trunk/)
* [JVGS](http://jvgs.sourceforge.net/) - Minimalistic platform game.
* [Mega Mario](https://sourceforge.net/projects/mmario/), [SuperTux](https://www.supertux.org/), [ReTux](http://retux.nongnu.org/), [Secret Maryo](http://secretmaryo.org/) and [The Secret Chronicles of Dr. M.](https://secretchronicles.org/en/) - Clones of Mario. SupertTux is [currently in need of help if it's to stay alive](https://www.reddit.com/r/linux_gaming/comments/8tmc1x/classic_open_source_game_super_tux_seeking_help/)
* [Mr. Rescue](http://tangramgames.dk/games/mrrescue/) - Play as a fireman rescuing people. [Source code here](https://github.com/SimonLarsen/mrrescue) for people who want to package it for their distro
* [OpenClonk](https://www.openclonk.org/) - Weird Online 2D Mining
* [Parallel Universe](https://gamejolt.com/games/Parallel-Universe/376425) - Minimalist Yin and Yang Platformer.
* [RickyD](https://sourceforge.net/projects/rickyd/) and [xrick](http://www.bigorno.net/xrick/) - Clones of Rick Dangerous.
* [Sienna](http://tangramgames.dk/games/sienna/) - Fun little runner/platformer. [Source code](https://github.com/SimonLarsen/sienna)
* [Sonic Robo Blast 2](https://www.srb2.org) - 3D fangame based on the Sonic the Hedgehog series with many [mods](https://mb.srb2.org/forumdisplay.php?s=5f226b9ddf679db8bac7b39a3ed92bf5&f=69).
* [Spelunky Classic HD](https://yancharkin.itch.io/spelunky-classic-hd) - Cave exploration / treasure-hunting game inspired by classic platform games and roguelikes
* [Super Mario War](http://smwstuff.net/game) - A Super Mario multiplayer game in where the goal is to stomp as many other Marios as possible. ([Switch port](https://github.com/p-sam/supermariowar-nx))
* [Super Methane Brothers](http://methane.sourceforge.net/), [The Bub's Brothers](https://sourceforge.net/projects/bub-n-bros/) - Clones of Bubble Bobble.
* [The Legend of Edgar](https://www.parallelrealities.co.uk/games/edgar/) - Action platformer game.
* [Tobu Tobu Girl](http://tangramgames.dk/tobutobugirl/) - Arcade platformer where you have to save your cat who is floating into the atmosphere.


# Programming
* [Robocode](https://robocode.sourceforge.io/) - Programming game, where the goal is to develop a robot battle tank to battle against other tanks in Java or .NET.


# Puzzle

* [1010! Klooni](https://lonamiwebs.github.io/klooni/) - Minimalistic puzzle game.
* [Bombman](https://gitlab.com/drummyfish/Bombman) - Atomic Bomberman clone.
* [Atomiks](https://sourceforge.net/projects/atomiks/) - Atomix clone.
* [Crack Attack!](https://www.nongnu.org/crack-attack/), [FreeBlocks](https://github.com/dorkster/freeblocks) and [Panel Attack](https://github.com/sharpobject/panel-attack) - Clones of the puzzle game Tetris Attack.
* [Cuyo](https://www.karimmi.de/cuyo/) - Tetris-style puzzle game for up to two players.
* [Gweled](https://launchpad.net/gweled/) and [Freegemas](https://github.com/JoseTomasTocino/freegemas) - Clones of Bejeweled.
* [Hextris](https://hextris.github.io/) - Puzzle game inspired by Tetris.
* [Lix](http://www.lixgame.com/) and [Rabbit Escape](https://github.com/andybalaam/rabbit-escape) - Clones of Lemmings.
* [Mice Men: Remix](https://github.com/synkarius/micemen) - Remake of the DOS game Mice Men.
* [Mirror Magic](http://www.artsoft.org/mirrormagic/) - Arcade style puzzle game.
* [OpenBlok](https://github.com/mmatyas/openblok) - Clone of Tetris.
* [Orbium](https://github.com/bni/orbium) - Clone of Log!cal.
* [pocico](https://manik-sinha.itch.io/pocico) - Puzzle game where the goal is to match the outer color with the inner color in every shape.
* [Rocks'n'diamonds](http://www.artsoft.org/rocksndiamonds/download/) - Clone of Boulder Dash.
* [Sudoku JS](https://github.com/baruchel/sudoku-js), [Open Sudoku](https://opensudoku.moire.org/) and [Nudoku](https://jubalh.github.io/nudoku/) - Games of Sudoku
* [Tanglet](https://gottcode.org/tanglet/) - Single player word-finding game based on Boggle.
* [The Butterfly Effect](http://the-butterfly-effect.org/) - Clone of Crazy Machines.
* [The lost Penguin](https://lebug.itch.io/the-lost-penguin) - Guide laser beams through multiple mirrors to resolve the puzzles. 
* [Wizznic!](http://wizznic.org/) - A difficult puzzle game with built-in puzzle-editor.


# Puzzle-platformer games

* [GlPortal](http://lexaloffle.com/) - Clone of Portal.
* [Mari0](http://stabyourself.net/mari0/#download) - Odd mix of Mario and Portal.
* [Minilens](https://kobuge-games.github.io/minilens/)
* [Nova the Squirrel](https://github.com/NovaSquirrel/NovaTheSquirrel) - NES game with ability copying and puzzles.


# Racing/Driving
* [Extreme Tux Racer](https://sourceforge.net/projects/extremetuxracer/) and [Tux Rider - Android Edition](http://drodin.com/tuxrider)- High speed arctic racing games based on Tux Racer.
* [Marble Marcher](https://github.com/HackerPoet/MarbleMarcher) - Ray-traced racing game on the surface of evolving fractals.
* [Speed Dreams](http://www.speed-dreams.org/) - Motorsport simulation and racing game.
* [Stunt Rally](http://stuntrally.tuxfamily.org/) - Racing game with rally style of driving.
* [The Open Racing Car Simulator](https://sourceforge.net/projects/torcs/) - Car racing simulation.
* [Trigger Rally](http://trigger-rally.sourceforge.net/) - Fast-paced single-player racing game.
* [VDrift](https://sourceforge.net/projects/vdrift/) - Racing simulator.
* [Yorg](https://www.ya2.it/pages/yorg.html#yorg) - 3d racing game in the style of MicroMachines.


# Sandbox/Voxel

* [ClassicalSharp](https://github.com/UnknownShadow200/ClassicalSharp)
* [Craft](https://www.michaelfogleman.com/projects/craft/)
* [Freeminer](https://github.com/freeminer/freeminer)
* [Gnomescroll](https://github.com/Gnomescroll/Gnomescroll), [ClassiCube](https://www.classicube.net/) and [Freeminer](http://freeminer.org/) - Minecraft-clones.
* [Lamecraft](https://code.google.com/archive/p/lamecraft/)
* [Manic Digger](http://manicdigger.github.io/)
* [Minetest](https://www.minetest.net/) - (GNU/Linux, FreeBSD, Windows, Mac & Android) - Uses C++, Requires [mods](https://content.minetest.net) to be fun
* [OpenSpades](http://openspades.yvt.jp/) - Clone of the team-based first-person shooter and voxel-based sandbox Ace of Spades.
* [Terasology](https://terasology.org/) - Fancy lookin' Minecraft
* [TrueCraft](https://github.com/SirCmpwn/TrueCraft) - Clean-room implementation of Minecraft 1.7.3
* [Voxelands](https://www.voxelands.com/) - Minecraft standard clone?
* [voxel.js](http://voxeljs.com/) - Tool for creating minecraft clones


# Sealth games
* [Art Treachery](https://headmade.itch.io/art-treachery) - Stealthy art heist game.
* [The Dark Mod](http://www.thedarkmod.com/) - Fan-made spin-off the the fantastic Thief series **(Not suitable for low-end systems)**


# Shoot 'em up

* [Bloodworks](https://taytay.itch.io/bloodworks) - Top-down survival action game where you fight against an endless waves of monsters.
* [C-Dogs SDL](https://github.com/cxong/cdogs-sdl) - Clone of the shoot 'em up C-Dogs.
* [Chromium B.S.U.](https://sourceforge.net/projects/chromium-bsu/) - Fast paced, arcade-style, top-scrolling space shooter.
* [Dave Gnukem](https://djoffe.com/gnukem/) - Retro-style 2D scrolling platform shooter, inspired by and similar to Duke Nukem 1.
* [Friking Shark](https://repo.openpandora.org/?page=detail&app=friking-shark-ptitseb) - Remake of the shoot 'em up game Flying Shark.
* [Gang Garrison 2](https://gamejolt.com/games/gg2/278094) - Multiplayer 'demake' of Team Fortress 2.
* [Galaxy Forces V2](http://www.galaxy-forces.com/) - 2D multiplayer space shooter, inspired by the Amiga classic Gravity Force.
* [heXon](https://luckeyproductions.itch.io/hexon) - Twin-stick-shooter for up to four players
* [Lisparuga](https://davexunit.itch.io/lisparuga) - 2D shoot-em-up game inspired by Ikaruga. (GNU/Linux systems only)
* [M.A.R.S.](http://mars-game.sourceforge.net/) - 2D space shooter.
* [Maelstrom](https://www.libsdl.org/projects/Maelstrom/) - Clone of Asteroids
* [NightHawk](https://sourceforge.net/projects/night-hawk/) - Clone of Paradroid.
* [Relic Hunters Zero](https://www.relichunters.com.br/) - Online cooperative shooter/RPG. [Source code](https://github.com/mventurelli/relichunterszero)
* [Torrega Race](https://github.com/andwj/torrega) - Simple space game inspired by Omega Race.
* [Violetland](https://violetland.github.io/) - Cross-platform game similar to Crimsonland.
* [Watch out for Snakes](https://matt-lucas.itch.io/watch-out-for-snakes) - Short low poly top down retro arcade shooter.
* [Witch Blast](https://github.com/Cirrus-Minor/witchblast) - Roguelite dungeon crawl shooter heavily inspired from Binding Of Isaac.


# Social simulation
* [Cart Life](https://archive.org/details/cart-life-v1.6) - Simulation game in which the player controls one of three street vendors, and attempts to run their shop whilst looking after their health, interests, and families. [Source code](https://github.com/gondur/cartlife_src)
* [Coming Out Simulator 2014](https://github.com/ncase/coming-out-simulator-2014) - Interactive game intended to help LGBT youth to understand their sexuality.
* [Our Personal Space](http://metasepia.icecavern.net/OurPersonalSpace/) - Marriage survival sim set on a space colony in the near future.
* [Two Interviewees](https://maurovanetti.itch.io/2i) - Short visual novel about the gender gap.


# Space Combat/Sim

* [Antares](https://arescentral.org/antares) - Tactical space-combat game, combining elements of both arcade shooters and real-time strategy games.
* [Bridge Command](https://www.bridgecommand.co.uk/) - An interactive ship simulator.
* [EmptyEpsilon](https://daid.github.io/EmptyEpsilon/) - A spaceship bridge simulator game
* [Endless Sky](https://endless-sky.github.io/) - 2D space trading and combat game similar to the classic Escape Velocity series
* [Naev](https://store.steampowered.com/app/598530/Naev/) - open-source game about space exploration, trade and combat
* [Oolite](http://www.oolite.org/) - Well done Elite remake, with plentiful mod support.
* [Pioneer](http://pioneerspacesim.net/#&panel1-1) - a remake of the sequel to Elite, Frontier.
* [The Pandoran War](https://www.parallelrealities.co.uk/games/pw/) - 2D mission-based space shooter.
* [Ur-Quan Masters](http://sc2.sourceforge.net/) - Updated version of Star Control II. Be sure to download the Voice Pack! ([Alternative HD version available here](https://sourceforge.net/projects/urquanmastershd/))
* [Vega Strike](http://vegastrike.sourceforge.net/) - Open Source 3D Action-Space-Sim


# Sport game

* [Bygfoot](http://www.bygfoot.com/) - Football/soccer management game.
* [Classic 8-Ball Pool](https://github.com/henshmi/Classic-8-Ball-Pool) - Pool game written in JS and HTML5.
* [FooBillard](http://foobillard.sourceforge.net/) - OpenGL-based billiards simulation game.
* [Goal Rush](https://collectifblueprint.itch.io/goal-rush) - Fast paced arcade game where two-robots team will face each other to score the maximum of goals during short matchs.
* [YSoccer](http://ysoccer.sourceforge.net/index.html) - Retro style, multi-platform soccer game.


# Strategy/Tactics

* [0 A.D.](https://play0ad.com) (GNU/Linux, Windows, Mac) - a game of ancient warfare.
* [Advanced Strategic Command](http://www.asc-hq.org/) and [Crimson Fields](http://crimson.seul.org/) - Clones of the turn based strategy game Battle Isle.
* [Ancient Beast](https://github.com/FreezingMoon/AncientBeast) - A turn based strategy game similar to Heroes of Might and Magic.
* [Anuto](https://github.com/reloZid/android-anuto) - Tower defense game for Android.
* [Battle City](http://battlecity.org/) -  Multiplayer RTS in which you control a tank and your mission is to destroy enemy cities while defending your own.
* [Bos Wars](https://www.boswars.org/index.shtml) - Sci-fi RTS game.
* [Castle-Combat](https://www.linux-games.com/castle-combat/) - Clone of the arcade game Rampart.
* [Dominus](https://dominusgame.net/) - Multiplayer social strategy game. [Source code](https://github.com/dan335/dominus)
* [Freeciv](http://www.freeciv.org/) (GNU/Linux, Windows) - A clone of Civilization II from the Sid Meier's Civilization series.
* [FreeCol](http://www.freecol.org/news/freecol-0.11.6-released.html) - Clone of Colonization
* [Free Mars](https://sourceforge.net/projects/freemars/) - Turn based strategy game about colonizing Mars.
* [FreeOrion](http://www.freeorion.org/index.php/Main_Page) - Clone of Master of Orion
* [Gigalomania](http://gigalomania.sourceforge.net/) - RTS MegaLoMania-like god game.
* [Globulation 2](https://globulation2.org/wiki/Main_Page) - RTS featuring auto-tasking to units.
* [Julius](https://github.com/bvschaik/julius) - Re-implementation of Caesar III.
* [Liberation Circuit](https://linleyh.itch.io/liberation-circuit) - Rogue A.I. Simulator.
* [MAXR](https://www.maxr.org/) - Remake of the real-time/turn-based strategy game M.A.X.
* [Mr.Boom](http://mrboom.mumblecore.org/), [SDL Bomber](http://www.linuxmotors.com/SDL_bomber/) and [Bombermaaan](https://sourceforge.net/projects/bombermaaan/) - Bomberman clones.
* [Megaglest](https://megaglest.org/) - RTS where you control the armies of one of seven different factions
* [Necro](https://gamejolt.com/games/_Necro_/384336) - A text based Virus simulator similar to Plague Inc. [Source code](https://github.com/78Alpha/Necro)
* [OpenRA](http://www.openra.net/) - Open-Source implementation of C&C: Red Alert, Tiberian Sun, and Dune 2000
* [Spring: 1944](http://spring1944.net/) - RTS game set in the final year of WWII.
* [Spring RTS](https://springrts.com/) - RTS game engine that has a few complete games made from it, like Zero-K
* [Seven Kingdoms: Ancient Adversaries](https://www.7kfans.com/wiki/index.php/Download) - GPL release of Seven Kingdoms: Ancient Adversaries
* [Tanks of Freedom](https://w84death.itch.io/tanks-of-freedom) - Turn based strategy, similar to Advance Wars on the GBA.
* [The Battle For Wesnoth](https://www.wesnoth.org/) (GNU/Linux, Windows, Mac, Android & iOS) - a turn-based strategy game with a high fantasy theme.
* [The Last Stand](https://github.com/Belz/game-the-last-stand)
* [TripleA](https://triplea-game.org/) - Game based on Axis & Allies board game.
* [OpenXcom](https://openxcom.org/about/) and [Xenowar](http://xenowar.net/) - Clones of the X-Com series. [UFO: Alien Invasion](https://ufoai.org/wiki/News) and [UFO2000](http://ufo2000.sourceforge.net/) - X-Com clones.
* [Warzone 2100](https://wz2100.net/) - 3D RTS that offers campaign, multi-player, and single-player skirmish modes.
* [webDiplomacy](http://www.webdiplomacy.net/index.php) - Online version of the game Diplomacy. [Source code](https://sourceforge.net/projects/phpdiplomacy/)
* [Widelands](https://wl.widelands.org/) (GNU/Linux, BSD, Windows & Mac) - A real-time strategy game focused on building an economy. Based on Settlers 2.
* [Wyrmsun](https://andrettin.github.io/) - An interesting fantasy RTS

# Vehicular combat

* [Armagetron Advanced](http://www.armagetronad.org/) - Multiplayer 3D clone of Tron.
* [BZFlag](https://www.bzflag.org/) - 3D online multi-player tank battle game.
* [OpenC1](http://1amstudios.com/projects/openc1/) - Remake of Carmageddon


# Walking simulator
* [november](https://duck.pizza/creative/november/) - Short horror/escape room/walking simulator.
* [Slave Of God](https://www.increpare.com/2012/12/slave-of-god/) - Trippy psychedelic ride simulator.
* [Wave Function Collapse](https://marian42.itch.io/wfc) - Infinite, procedurally generated city, assembled out of blocks.
* [you used to be someone](http://squinky.me/2017/12/11/you-used-to-be-someone/) - Based on the developer experience having a major depressive episode.


# Uncategorized

* [90 Second Portraits](http://tangramgames.dk/games/90secondportraits/) - Painting game
* [Agar.io Clone](https://alternativeto.net/software/agar-io-clone/) - Simple Agar.io clone.
* [Thrive](http://revolutionarygamesstudio.com/) - Game about the evolution of life.