There are literally thousands of games that can be played on Linux, if you're a casual gamer or hardcore Linux fan who is looking to have a bit of fun on your favourite distro, there's plenty of games to choose from.

If you are unsure what to get, this list will help you out. This list includes all the popular and free high quality games that runs on Linux natively, from action/first-person shooters to real-time and turn-based strategy games to rpg/mmorpg etc.

If you have more games that you would like to recommend, feel free to share it.

Below are the list. Have fun!

Urban Terror is a free, stand-alone first-person shooter computer game developed by FrozenSand. It is available for Windows, Linux and Mac. Urban Terror is played using the free, stand-alone, ioquake3 engine modified, which doesn't require Quake III Arena anymore. It features realistic gameplay, much like in Counter Strike, its enjoyable and addictive game.

Genre: Action, First person shooter

License: Proprietary/Closed Source

Cost: Free

Website: http://www.urbanterror.info/home/

Alien Arena is a free, stand-alone first-person shooter computer game based on source code released by id Software. The game runs on the CRX engine, and features modern effects such as real-time lighting and shadows, shaders, light bloom, reflective surfaces and much more, while still being able to run on even modest systems. The game includes a built in, as well as external server browser and chat client. Players can look up their stats online, chat with other players, and become part of a growing community. The Alien Arena experience is now a finely tuned, highly polished body of work. Alien Arena has transformed into a lean, clean, fragging machine, with stunning visual effects that are usually reserved for commercial titles.

Genre: Action, First person shooter

License: Free/Open source

Cost: Free

Website: http://red.planetarena.org/

Wolfenstein: Enemy Territory is a free, stand-alone, downloadable multiplayer game in which players wage war as Axis or Allies in team-based combat. It's a team game; you will win or fall along with your comrades. The only way to complete the objectives that lead to victory is by cooperation, with each player covering their teammates and using their class special abilities in concert with the others.

Genre: Action, First person shooter, Tactical shooter

License: Proprietary/Closed Source

Cost: Free

Website: http://www.splashdamage.com/wolfet#/screens_wet/003_tb.jpg

TrueCombat:Elite is an Enemy Territory total conversion modification of the free, popular, stand-alone first-person shooter Wolfenstein: Enemy Territory. TCE puts you into the role of elite mercenary soldier in the conflicts of two internationally operating forces. The Global Intervention Force (GIF626 aka in-game as "Spec Ops") is a special force formed of the top of the world experts joining from US Delta force, UK SAS, German KSK and GSG9, to mention a few. An international mercenary organization known as "The Unit" (aka "Terror" in-game) is their opponent.

Genre: Action, Total conversion, First person shooter, Tactical shooter

License: Proprietary/Closed Source

Cost: Free

Website: http://www.truecombatelite.com/

True Combat: Close Quarters Battle (TC:CQB) is the successor to True Combat: Elite (TC:E), a tactical shooter with online multiplayer. The game is currently in alpha version, so expect bugs (and more features/maps to come).

Genre: Action, Total conversion, First person shooter, Tactical shooter

License: Proprietary/Closed Source

Cost: Free

Website: http://www.truecombatelite.com/

Smokin' Guns (SG) is a first-person shooter video game. Smokin' Guns is intended to be a semi-realistic simulation of the "Old West's" atmosphere and was developed on id Software's Quake III Arena Engine. Gameplay as well as locations are inspired by Western movies, particularly from the Italowestern respectively Spaghetti Western genre.

Genre: Action, First person shooter

License: Free/Open source

Cost: Free

Website: http://www.smokin-guns.net/

AssaultCube is a FREE multiplayer first-person shooter game, based on the CUBE engine. Taking place in realistic environments, with fast, arcade gameplay, it's addictive and fun! With efficient bandwidth usage, it's low-latency and can even run over a 56Kbps connection. It's tiny too, weighing in at a lightweight 40 MB package available for Windows, Mac and Linux. On the correct settings, it can even run on old hardware (Pentium III and above).

Genre: Action, First person shooter

License: Free/Open source

Cost: Free

Website: http://assault.cubers.net/

Cube 2: Sauerbraten is a free multiplayer/singleplayer first person shooter, built as a major redesign of the Cube FPS. Much like the original Cube, the aim of this game is not necessarily to produce the most features & eyecandy possible, but rather to allow map/geometry editing to be done dynamically in-game, to create fun gameplay and an elegant engine.

Genre: Action, First person shooter

License: Free/Open source

Cost: Free

Website: http://sauerbraten.org/

DarkPlaces is a port/mod of the Quake engine using the source code released by id Software.

Genre: Action, First person shooter

License: Free/Open source

Cost: Free

Website: http://icculus.org/twilight/darkplaces/

Nexuiz is a free first-person shooter by Alientrap Software. Nexuiz uses DarkPlaces, a significantly modified Quake engine. The graphics in Nexuiz use coronas, the bloom shader effect, Realtime World and Dynamic Lighting and shadowing, shaders (with OpenGL 2.0), offset mapping, and High dynamic range rendering. All these effects can be turned off to make the game run on older hardware.

Nexuiz is primarily multiplayer (though it includes a full single-player campaign, which allows one to play through the various multiplayer game types and maps with bots), and allows for hosting and joining of games. It can also support new gametypes, or whole conversions quickly applied to it (much like Quake). Nexuiz supports most Quake modifications (although with varying functionality). Currently there are a few custom mods and maps used.

Genre: Action, First person shooter

License: Free/Open source

Cost: Free

Website: http://www.alientrap.org/games/nexuiz

Xonotic is a first-person shooter video game. It is cross-platform, free and open source software. It is a fork of Nexuiz, and is based on the DarkPlaces engine, a heavily modified version of the Quake engine.

Genre: Action, First person shooter

License: Free/Open source

Cost: Free

Website: http://www.xonotic.org/

Red Eclipse is a Free and Open Source game, using SDL and OpenGL which allows it to be ported to many platforms. The game is a single-player and multi-player first-person ego-shooter, built as a total conversion of Cube Engine 2, which lends itself toward a balanced gameplay, completely at the control of map makers, while maintaining a general theme of agility in a variety of environments.

Genre: Action, First person shooter

License: Free/Open source

Cost: Free

Website: http://www.redeclipse.net/

Legends is a fast-paced first-person-perspective online multiplayer game released as freeware (software license). The game is designed to take advantage of the beautiful environments available from the Torque engine it is based on, while still offering the breakneck pacing and variety of styles available from such classics as Quake and Tribes.

Gameplay is not the strafe-strafe-jump-strafe-shoot-strafe-run-like-hell style a lot of games espouse; the addition of a jetpack adds a third dimension of mobility that makes skill, forethought, and restraint necessities to winning.

Genre: Action, First person shooter

License: Proprietary/Closed Source

Cost: Free

Website: http://www.legendsthegame.net/

World of Padman is an open source first-person shooter computer game available in both English and German. Originally it was a modification for the game QUAKE III Arena titled PadMod created in the year 2004. After the source code for Quake III Arena was released, the game became standalone. The idea is based on the Padman comic strip for the magazine PlayStation Games created by the professional cartoon artist Andreas 'ENTE' (German for "Duck") Endres, who is also the man who made many of the maps included with the game in 1998. The current version runs on an enhanced version of the ioquake3 engine, which is based on the Quake III Arena engine. Most of the maps in the game are lilliput style, and have a commercial-quality level of graphic complexity.

Genre: Action, First person shooter

License: Free/Open source

Cost: Free

Website: http://www.worldofpadman.com/

Tremulous is a free and open source team-based first-person shooter with real-time strategy elements. The game features two opposing teams: humans and aliens. Each team must attack the enemy's base and team members, while defending their own base. The game has been downloaded over 2,000,000 times and was voted Player's Choice Standalone Game of the Year in Mod Database's Mod of the Year 2006 competition.

Genre: Action, Strategy, First person shooter, Real-time

License: Free/Open source

Cost: Free

Website: http://tremulous.net/

Warsow is a completely free fastpaced first-person shooter (FPS) set in a futuristic cartoon-like world for Windows, Linux and Mac OS X.

Genre: Action, First person shooter

License: Proprietary/Closed Source

Cost: Free

Website: http://www.warsow.net/

OpenArena is a free network enabled multiplayer first person shooter based on the ioquake3 fork of the id tech 3 engine. It features many game types including the traditional deathmatch and sports a varied cast of sadistic characters. Due to violent and occasional racy content it is probably unsuitable for children under the age of 17.

Genre: Action, First person shooter

License: Free/Open source

Cost: Free

Website: http://www.openarena.ws/smfnews.php

ZEQ2-Lite is an open-sourced and mod expandable project based on a highly modified ioQuake3 engine foundation and features many true-to-reference DBZ visuals and mechanics. Additionally, there exists a custom from-scratch particle system as well an extended number of configuration files that can be used to control character skills (visually & mechanically), world particle effects, forms / transformations / tiers, music playlists, and other aspects. This attribute makes the project more than simply another DBZ modification as strong capabilities exist for user mod creation exists without need for actual programming.

Genre: Action, Third person

License: Free/Open source

Cost: Free

Website: http://zeq2.com/lite/

Zero Ballistics is a unique blend of first person shooter and tank combat, focusing on multiplayer gaming exclusively. Set in lush alpine environments covering all seasons, playing Zero Ballistics is as thrilling as it is relaxing.

Genre: Action, Shoot/Beat 'em up

License: Free/Open source

Cost: Free

Website: http://www.zeroballistics.com/

Q3Rally is a car driving and car combat Modification for OpenArena.

Genre: Action, Driving

License: Free/Open source

Cost: Free

Website: http://www.q3rally.com/

Greedy Car Thieves is an action driving game that takes its cues from the classic top-down GTA games. Multiplayer action is the primary focus, allowing players to free roam around the city in a slew of game modes including Free For All, Bombmatch and Race. A map editor is also available.

Genre: Action, Driving, Third person

License: Proprietary/Closed Source

Cost: Free

Website: http://gct-game.net/

Lemmingball Z is a fighting game for linux and windows, loosely based on `Dragonball Z` the hit anime. And when we say loosely based, we mean with a big twist. Instead off the normal characters from the anime, this game features cute LEMMINGS fighting DBZ style!

Genre: Action

License: Proprietary/Closed Source

Cost: Free

Website: http://www.lbz3d.com/

Waterstorm is a 2d multiplayer game. Fast paced action with mini submarines and four game modes.

After years of exploiting the Earth, the polar caps melted as a consequence of the greenhouse effect. Water has flooded the majority of our continents pollution, toxic waste and atomic contamination have made the remaining ones uninhabitable.

Genre: Action

License: Proprietary/Closed Source

Cost: Free

Website: http://www.waterstorm-game.com/portal/index.php

Teeworlds is a free online multiplayer game, available for all major operating systems. Battle with up to 16 players in a variety of game modes, including Team Deathmatch and Capture The Flag. You can even design your own maps!

Genre: Action

License: Free/Open source

Cost: Free

Website: http://www.teeworlds.com/

Savage: The Battle for Newerth is a science fantasy computer game that combines aspects of the real-time strategy (RTS) and first-person shooter (FPS) genres. It takes place in the distant future when humankind has rebuilt society following an apocalypse, but is threatened by intelligent beasts. The game was released in 2003, and was turned freeware on September 1, 2006.

Genre: Action, Strategy, First person shooter, Third person

License: Proprietary/Closed Source

Cost: Free

Website: http://www.newerth.com/

Savage 2: A Tortured Soul is the sequel to the critically acclaimed online multiplayer game, which introduced gamers to the completely new Real Time Strategy Shooter (RTSS) gaming genre. Savage enabled players to opt for either the fast-paced, run-and-gun action of a first-person shooter (FPS) game – playing as a Warrior – or the more cerebral and tactical planning of a real-time strategy (RTS) game – playing as a Commander – working together as a team to defeat the enemy. Savage 2: A Tortured Soul builds upon the addicting, fast-paced gameplay of the original with additional squad-based features and enhanced role-playing game (RPG) elements which enable players to build their character level and abilities throughout the game.

Genre: Action, Strategy, First person shooter, RPG

License: Proprietary/Closed Source

Cost: Free

Website: http://savage2.com/en/main.php

Regnum Online is a free massive multiplayer online role playing game (MMORPG) where the player are immersed in a 3D virtual world. There they can live as Elves, Humans Dwarves, or Dark Elves for example having exciting adventures, exploring the wild lands or joining an army of players to take on the other kingdoms armies. Regnum Online is absolutely free and you can play with no level or time restrictions.

Genre: MMORPG

License: Proprietary/Closed Source

Cost: Free

Website: http://www.regnumonlinegame.com/index.php?l=1&sec=0

PlaneShift is a Role Playing Game immersed into a 3D virtual fantasy world which is fully free to play. Fully free means you will have no surprises of premium content which will limit your gameplay or unbalance the game. There are no limitations in skills, ranks, abilities, items you can gain with your free account. There are no time limits or additional constraints.

Genre: MMORPG

License: Free/Open source

Cost: Free

Website: http://www.planeshift.it/

Auteria is a fantasy world within our real world, it is free and a very interesting, modern, massively multiplayer online role-playing game (MMORPG), which will put you in a fantasy world with many problems to solve (quests), many other players to meet (growing community), and finally many secrets to discover for yourself. It is a free to play 3D multiplayer online game. Auteria is still under developement and in an Open Beta stage.

Genre: MMORPG, Third person

License: Proprietary/Closed Source

Cost: Free

Website: http://auteria.com/

IConquerU is a free fantasy massively multiplayer online role-playing game (MMORPG). Take the role of a valorous adventurer and explore a mysterious world filled with magic and bravery! Meet up with people from all over the world to live through a whole new game experience!

Genre: MMORPG

License: Proprietary/Closed Source

Cost: Free

Website: http://www.iconqueryou.com/

Eternal Lands is a free 3D fantasy MMORPG created by Radu Privantu. Set in a classic medieval fantasy world, Eternal Lands has a wide range of playable races and a skill based progression system. Players can level up any of the twelve skills by using them. There are no racial differences, instead players can specialize their character anyway they want as they progress through the game. Eternal Lands has the look and feel of classic PC RPGs. Movement and combat are point and click, but many of the models are rendered in 3D. It’s not the most exciting MMORPG, but players looking for an oldschool experience with plenty of role playing potential may enjoy Eternal Lands.

Genre: MMORPG

License: Proprietary/Closed Source

Cost: Free

Website: http://www.eternal-lands.com/

RuneScape is a free MMORPG, set in a fantasy world of warring races, ravaged landscapes and sinister powers. Having chosen an adventurer, players are free to find their role within it: to live by the sword and face hundreds of enemies, to further the storyline in RuneScape's quests, or to train in any of a number of skills.

Genre: MMORPG

License: Proprietary/Closed Source

Cost: Free

Website: http://www.runescape.com/

The Mana World (TMW) is a Massive Multiplayer Online Role Playing Game (MMORPG). TMW uses 2D graphics and aims to create a large and diverse interactive world with thousand of players online. The Mana World can be played on Windows, Linux and OSX.

Genre: MMORPG

License: Free/Open source

Cost: Free

Website: http://themanaworld.org/

Daimonin is a graphical 2d tile-based MMORPG with true color and mp3 sound. Daimonin offers a free public server at http://www.daimonin.com.

Genre: MMORPG

License: Free/Open source

Cost: Free

Website: http://www.daimonin.org/

Atrinik is a free open source MMORPG with 2D isometric graphics based on Daimonin and Crossfire. All the content and code is released under GNU GPL.

Genre: MMORPG

License: Free/Open source

Cost: Free

Website: http://www.atrinik.org/

Stendhal is a fully fledged multiplayer online adventures game (MMORPG) developed using the Arianne game development system. Stendhal features a new, rich and expanding world in which you can explore towns, buildings, plains, caves and dungeons. You will meet NPCs and acquire tasks and quests for valuable experience and cold hard cash. Your character will develop and grow and with each new level up become stronger and better. With the money you acquire you can buy new items and improve your armour and weapons. And for the blood thirsty ones of you; satisfy your killing desires by roaming the world in search of evil monsters!

Genre: MMORPG

License: Free/Open source

Cost: Free

Website: http://stendhalgame.org/

GemRB is a portable open-source implementation of Bioware's Infinity Engine which was written to support pseudo-3D role playing games based on the Dungeons & Dragons ruleset. That includes game classics like the Baldur's Gate series, Planescape: Torment and the Icewind Dale series. It is in beta stage.

Genre: RPG

License: Free/Open source

Cost: Free

Website: http://www.gemrb.org/wiki/doku.php?id=start

Hero of Allacrost is a single player 2D role-playing game inspired by classic console RPGs. In Hero of Allacrost, the player will explore rich environments, solve challenging dungeon puzzles, and fight strategic battles in an active-time based system.

Genre: RPG

License: Free/Open source

Cost: Free

Website: http://www.allacrost.org/

FreedroidRPG is a mature open source sci-fi isometric role playing game. It strives at providing an immersive ambience backed by refined graphics and music tracks. Besides the hack'n'slash action phases, dialogs with dozens of NPCs take care of storytelling. The player can fight with melee or ranged weapons, take control of his enemies by hacking, and remotely execute code on enemy robots.

Originally based on FreeDroid Classic, this project now has vastly deviated from its parent.

The game tells the story of a world destroyed by a conflict between the bots and their human masters. Play as Tux in a quest to save the world from the murderous rebel bots who know no mercy. You get to choose which path you wish to follow, and freedom of choice is everywhere in the game.

Genre: RPG

License: Free/Open source

Cost: Free

Website: http://www.freedroid.org/

Ardentryst is an action/RPG sidescroller, focused not just on fighting, but on story, and character development. Strategy as well as reflexes will be needed to overcome the game. The game is set in another world. It is somewhat a cross between Donkey Kong Country, Mario, Castlevania and Kingdom Hearts. Ardentryst is focused on a fantasy world. The player is guided through a storyline which he or her must act in and play a major role in keeping peace and order in Ardentryst. It features two playable characters and a variety of weapons, items, armour, monsters, and beautiful level scenery and graphics.

Genre: RPG, Action, Adventure, Platform

License: Free/Open source

Cost: Free

Website: http://jordan.trudgett.com/

GNU FreeDink is an adventure/role-playing game. GNU FreeDink is a portable and enhanced version of the Dink Smallwood game engine.

Genre: Adventure, RPG

License: Free/Open source

Cost: Free

Website: http://www.gnu.org/software/freedink/

Battle for Wesnoth is a Free, turn-based tactical strategy game with a high fantasy theme, featuring both single-player, and online/hotseat multiplayer combat. Fight a desperate battle to reclaim the throne of Wesnoth, or take hand in any number of other adventures.

Genre: Turn-based Strategy

License: Free/Open source

Cost: Free

Website: http://www.wesnoth.org/

UFO: Alien Invasion is an open source strategy video game in which the player fights aliens that are trying to take control of the Earth.

Genre: Turn-based Strategy

License: Free/Open source

Cost: Free

Website: http://ufoai.ninex.info/wiki/index.php/News

Its turn-based strategy with fantasy theme and rpg-elements (e.g. leveling the units, and skills which you could raise). Your mission is to destroy enemies castle. You can be on good or evil side. A the moment game supports only 2 human player game, but in future we plan to add AI and network play. The gameplay is similar to this in Heroes of Might and Magic but its much simpler of course.

Genre: Turn-based Strategy

License: Free/Open source

Cost: Free

Website: http://info.wsisiz.edu.pl/~umbras/

The Free Heroes II project aims to recreate the Heroes of Might and Magic II engine as open source with SDL, to play the game on more platforms.

Genre: Turn-based Strategy

License: Free/Open source

Cost: Free

Website: http://sourceforge.net/apps/mediawiki/fheroes2/index.php?title=Main_Page

FreeCol is a turn-based strategy game based on the old game Colonization, and similar to Civilization. The objective of the game is to create an independent nation. You start with only a few colonists defying the stormy seas in their search for new land. Will you guide them on the Colonization of a New World?

Genre: Turn-based Strategy

License: Free/Open source

Cost: Free

Website: http://www.freecol.org/

FreeCiv is an Open Source game similar to the popular PC Civilization series by Sid Meier. Your goal is to build cities, collect resources, organize your government, and build an army. It is free to download and use.

Genre: Turn-based Strategy

License: Free/Open source

Cost: Free

Website: http://freeciv.wikia.com/wiki/Main_Page

LordsAWar! is a free, turn-based strategy game where up to 8 players strive for control of as many cities as possible. Produce new armies in cities to conquer nearby cities. Using the income from those cities, make more armies to take more cities. Send a hero to a temple to get a quest, or maybe search a nearby ruin instead. Play with others or against the computer.

Genre: Turn-based Strategy

License: Free/Open source

Cost: Free

Website: http://www.nongnu.org/lordsawar/

Scorched3D is a free to play and open source modernisation of the classic DOS game Scorched Earth "The Mother Of All Games". The game incorporates lively, fully destructible 3D landscapes that include animated jets, naval vessels, water and even birds, with detailed tanks and projectiles and stunning visual effects.

Genre: Turn-based Strategy

License: Free/Open source

Cost: Free

Website: http://www.scorched3d.co.uk/

Warmux (formerly wormux) is a free and open-source game getting its initial inspiration from the Worms game.

Genre: Turn-based Strategy

License: Free/Open source

Cost: Free

Website: http://www.wormux.org/phpboost/news/news.php

Hedgewars is a free and open-source game and is based on the Worms series. It is similar to Wormux, another open-source clone of Worms. Hedgewars is cross-platform and runs on Linux, Windows, and Mac OS X.

Genre: Turn-based Strategy

License: Free/Open source

Cost: Free

Website: http://www.hedgewars.org/

Glest is a free 3D real-time strategy game, where you control the armies of two different factions: Tech, which is mainly composed of warriors and mechanical devices, and Magic, that prefers mages and summoned creatures in the battlefield. Glest is not just a game, but also an engine to make strategy games, based on XML and a set of tools. A few mods already exist.

Genre: Real-time Strategy

License: Free/Open source

Cost: Free

Website: http://glest.org/en/index.php

MegaGlest is an open source 3D-real-time strategy game, where you control the armies of one of seven different factions: Tech, Magic, Egyptians, Indians, Norsemen, Persian or Romans. The game is setup in one of 16 naturally looking settings, which -like the unit models- are crafted with great appreciation for detail. Additional game data can be downloaded from within the game at no cost.

Genre: Real-time Strategy

License: Free/Open source

Cost: Free

Website: http://megaglest.org/

0 A.D. is a free, open-source, cross-platform real-time strategy game under development by Wildfire Games. It is a historical war and economy game focusing on the years between 500 B.C. and 500 A.D.

Genre: Real-time Strategy

License: Free/Open source

Cost: Free

Website: http://wildfiregames.com/0ad/

Seven Kingdoms is a free open source Real-time Strategy game designed by Trevor Chan, brings a mix of RTS like Warcraft 2 and turn-based strategy of Civilization. The real-time strategy with trade, diplomacy, and espionage sets it apart from the rest. In 2009, Enlight Software released the game under the GPL license. 7kfans project is updating the game and provides a community for fans. A free Seven Kingdoms will help continue the legacy. Seven Kingdoms now supports SDL instead of DirectX, and supports Linux natively.

Genre: Real-time Strategy

License: Free/Open source

Cost: Free

Website: http://7kfans.com/

Battles of Antargis is a medieval-like realtime strategy game. You are a hero who was betrayed and you have to unify the kingdom and rebuild the old empire. Old myths will pass your way.

Genre: Real-time Strategy

License: Free/Open source

Cost: Free

Website: http://antargis.berlios.de/

Zero-K is an open source RTS using the Spring engine. It aims to provide a dynamic massively multiplayer metagame built around a highly enjoyable, imaginative RTS core, as well as a compelling single-player experience.

Genre: Real-time Strategy, Total conversion

License: Free/Open source

Cost: Free

Website: http://zero-k.info/

Spring: 1944 is a WWII themed game based on the open source Spring Engine. Our goal is to create four fully functional sides (US, Germany, USSR, Britain) with period-accurate units and strengths. Realism is a primary design goal, second only to creating a game that is fun and accessible to play.

Genre: Real-time Strategy, Total conversion

License: Free/Open source

Cost: Free

Website: http://www.spring1944.org/

netPanzer is an online multiplayer tactical warfare game designed for fast action combat. Gameplay concentrates on the core - no resource management is needed. The game is based on quick tactical action and unit management in real-time. Battles progress quickly and constantly as destroyed players respawn with a set of new units. Players can join or leave games at any time.

Genre: Real-time Strategy

License: Free/Open source

Cost: Free

Website: http://www.netpanzer.org/

Widelands is an open source real-time strategy game aiming for gameplay similar to Settlers II by BlueByte. In this game, you start out on a small piece of land with nothing more than a few of useful resources. Using those, you can build yourself an empire with many thousands of inhabitants. On your way towards this goal, you will have to build up an economic infrastructure, explore the lands around you and face enemies who are trying to rule the world just like you do.

Genre: Real-time Strategy

License: Free/Open source

Cost: Free

Website: http://wl.widelands.org/

Unknown Horizons is a 2D realtime strategy simulation with an emphasis on economy and city building. Expand your small settlement to a strong and wealthy colony, collect taxes and supply your inhabitants with valuable goods. Increase your power with a well balanced economy and with strategic trade and diplomacy.

Genre: Real-time Strategy, Economy

License: Free/Open source

Cost: Free

Website: http://www.unknown-horizons.org/

OpenTTD is an open source remake and expansion of the 1995 Chris Sawyer video game Transport Tycoon Deluxe. It is an "urban planning and simulation game" in which the player aims to earn money through transportation of passengers and freight by land, water and air.

Genre: Simulation, Economy

License: Free/Open source

Cost: Free

Website: http://www.openttd.org/en/

Simutrans is a freeware and open-source transportation simulation game. Your goal is to establish a successful transport company. Transport passengers, mail and goods by rail, road, ship and air. Interconnect cities, districts, public buildings, industries and tourist attractions by buiding a transport network you always dreamed of.

Genre: Simulation, Economy

License: Free/Open source

Cost: Free

Website: http://www.simutrans.com/

LinCity-NG is a city simulation game. It is a polished and improved version of the classic LinCity game. In the game, you are required to build and maintain a city. You can win the game either by building a sustainable economy or by evacuating all citizens with spaceships.

Genre: Simulation, Economy

License: Free/Open source

Cost: Free

Website: http://lincity-ng.berlios.de/wiki/index.php/Main_Page

Vega Strike allows players to explore a vastly dynamic universe where frontiers collide and you're just a pilot trying to make ends meet. How? That's your decision. Vega Strike is designed as a non-linear gaming experience, where you choose what action you want to take.

Vega Strike features a dynamic trading economy, allowing your character to operate as a merchant. Discover what trade routes bring in the most profit, what commodities make you the most money given your ship's cargo space limitations, accept cargo missions and learn to avoid areas of danger (repairs eat into your profits!).

Genre: Simulation, Flying

License: Free/Open source

Cost: Free

Website: http://vegastrike.sourceforge.net/

Thunder and Lightning is a futuristic action flight simulator and realtime strategy game that takes place in a large 3D environment. Jump into the pilot seat of your Lightning aircraft and fight against Thunder tanks in a fierce battle for control of the island!

Apart from flight simulators, Thunder&Lightning takes inspiration from (but is not a clone or remake of) the 80's classic Carrier Command. This means that you will find yourself in control of a futuristic carrier with aircraft and amphibious tanks at your disposal. In the long run, there will be multiple Islands to conquer, each with its own defense strategy.

Genre: Simulation, Flying

License: Free/Open source

Cost: Free

Website: http://tnlgame.net/

FlightGear is an open-source, multi-platform, cooperative flight simulator developed by the FlightGear project since 1997. Source code for the entire project is available and licensed under the GNU General Public License.

Genre: Simulation, Flying

License: Free/Open source

Cost: Free

Website: http://www.flightgear.org/

GL-117 is an action flight simulator for Linux/Unix and MSWindows. Enter the Eagle Squadron and succeed in several challanging missions leading though different landscapes. Five predefined levels of video quality and an amount of viewing ranges let you perfectly adjust the game to the performance of your system. Joystick, mouse, sound effects, music...

Genre: Simulation, Flying

License: Free/Open source

Cost: Free

Website: http://www.heptargon.de/gl-117/gl-117.html

Search and Rescue II is a rescue helicopter simulator for Linux. It features several missions in which the player pilots a helicopter in order to rescue people in distress. There are several scenarios and helicopter models.

Genre: Simulation, Flying

License: Free/Open source

Cost: Free

Website: http://sar2.sourceforge.net/

Naev is a 2D space trading and combat game, in a similar vein to Escape Velocity. Naev is played from a top-down perspective, featuring fast-paced combat, many ships, a large variety of equipment and a large galaxy to explore. The game is highly open-ended, letting you proceed at your own pace.

Genre: Action, Flying

License: Free/Open source

Cost: Free

Website: http://code.google.com/p/naev/

Chromium B.S.U. is a fast paced, arcade-style, top-scrolling space shooter.

Genre: Arcade

License: Free/Open source/Artistic

Cost: Free

Website: http://www.reptilelabour.com/software/chromium/

Glaxium is an OpenGL-based space-ship "shoot-em-up" styled game. It is designed to provide the same feel as the old 2D games of that type, but with 3D for the special effects.

Genre: Arcade

License: Free/Open source

Cost: Free

Website: http://xhosxe.free.fr/glaxium/

Danger from the Deep (known as dangerdeep or DftD) is a free, Open Source World War II german submarine simulator.

Genre: Simulation, Navigate

License: Free/Open source

Cost: Free

Website: http://dangerdeep.sourceforge.net/

Rigs of Rods is an open source vehicle simulator licensed under the GNU General Public License version 3. What makes Rigs of Rods different to most simulators is its unique soft-body physics: vehicles, machines, objects, etc. are simulated in real-time as flexible soft-body objects, giving the simulation an extremely accurate behavior which entirely depends on the physical construction of the vehicles or objects you create.

Genre: Simulation, Navigate, Flying, Driving

License: Free/Open source

Cost: Free

Website: http://www.rigsofrods.com/

VDrift is a cross-platform, open source driving simulation made with drift racing in mind. It's powered by the excellent Vamos physics engine. It is released under the GNU General Public License (GPL) v2. It is currently available for Linux, FreeBSD, Mac OS X and Windows (Cygwin).

Genre: Simulation, Driving

License: Free/Open source

Cost: Free

Website: http://vdrift.net/

Ultimate Stunts is a remake of the famous DOS-game stunts. Racing in Ultimate Stunts involves some really spectacular stunts, like loopings, corkscrews, bridges to jump over, etc., but the best thing is that you can design your own tracks!

Genre: Simulation, Driving

License: Free/Open source

Cost: Free

Website: http://www.ultimatestunts.nl/

Tile Racer is a freeware 3D stunt racing game which features realistic car physics and an in game track editor to create new maps to race on.

Genre: Simulation, Driving

License: Proprietary/Closed Source

Cost: Free

Website: http://tileracer.model-view.com/tl/index.php/news.html

ManiaDrive is a free clone of Trackmania, the great game from Nadéo studio, and is an arcade car game on acrobatic tracks, with a quick and nervous gameplay (tracks almost never exceed one minute), and features a network mode, as the original.

Genre: Simulation, Driving

License: Free/Open source

Cost: Free

Website: http://maniadrive.raydium.org/index.php/

TORCS is a highly portable multi platform car racing simulation. It is used as ordinary car racing game, as AI racing game and as research platform.

Genre: Simulation, Driving

License: Free/Open source

Cost: Free

Website: http://torcs.sourceforge.net/

Speed Dreams is a fork of the famous open racing car simulator TORCS, aiming to implement exciting new features, cars, tracks and AI opponents to make a more enjoyable game for the player, as well as constantly improving visual and physics realism.

Genre: Simulation, Driving

License: Free/Open source

Cost: Free

Website: http://www.speed-dreams.org/

Trigger is a free 3d rally car racing game. fun for all the family! you race a sequence of 6 courses, with increasing levels of difficulty. Trigger is highly customisable, and it's easy to add new levels and vehicles.

Genre: Sports, Driving

License: Free/Open source

Cost: Free

Website: http://trigger-rally.sourceforge.net/

"A Tron clone in 3D". Armagetron Advanced (Armacycles Advanced in Fedora) is a multiplayer game in 3d that attempts to emulate and expand on the lightcycle sequence from the movie Tron. It's an old school arcade game slung into the 21st century. Highlights include a customizable playing arena, HUD, unique graphics, and AI bots. For the more advanced player there are new game modes and a wide variety of physics settings to tweak as well.

Genre: Action, Driving, Third person

License: Free/Open source

Cost: Free

Website: http://armagetronad.net/

A 3D game inspired by the movie TRON. It's a game for one to four players, the objective is not todrive into a wall.

Genre: Action, Driving

License: Free/Open source

Cost: Free

Website: http://gltron.org/

BMExt-GLtron is based on GLtron and brings two significal changes.

Genre: Action, Driving

License: Free/Open source

Cost: Free

Website: http://www.protorusz.hu/~bmate/bmextgltron/main.php

Extreme Tux Racer is a downhill racing game featuring Tux, the Linux Penguin. It is a free, open source game.

Genre: Arcade, Sports

License: Free/Open source

Cost: Free

Website: http://extremetuxracer.com/

SuperTuxKart is a Free 3D kart racing game, with many tracks, characters and items for you to try.

Genre: Arcade, Sports

License: Free/Open source

Cost: Free

Website: http://supertuxkart.sourceforge.net/

CannonSmash is a 3D tabletennis game. The goal of this project is to provide a computer game rendition of table tennis that allows the use of the various strategies available in the real game.

Genre: Simulation, Sports

License: Free/Open source

Cost: Free

Website: http://cannonsmash.sourceforge.net/

Free Tennis is a tennis simulation developed by a former tennis player. Its main feature is realism.

Genre: Simulation, Sports

License: Free/Open source

Cost: Free

Website: http://freetennis.sourceforge.net/

Slam Soccer 2006 is a funny football game in 3D-comic-style - and it's for free!

Genre: Sports

License: Free/Open source

Cost: Free

Website: http://www.bolzplatz2006.de/en/index.php

PokerTH is an open source Texas hold 'em simulator for Microsoft Windows, Mac OS X, and GNU/Linux. The game is faithful to the Texas Hold 'em rules and betting system. PokerTH allows for up to ten human players, with computer-controlled players filling in if there are not enough humans. Players can also play against other PokerTH users online.

Genre: Card game

License: Free/Open source

Cost: Free

Website: http://www.pokerth.net/home.html

Yo Frankie! is an open video game made by the Blender Institute, part of the Blender Foundation. It is based on the universe and characters of the free film produced earlier in 2008 by the Blender Institute, Big Buck Bunny.

Genre: Arcade, Third person

License: Free/Open source

Cost: Free

Website: http://www.yofrankie.org/

Plee The Bear will be a 2D platform game. As fun as an Earthworm Jim, as beautiful as a Sonic, as cool as a Mario, Plee The Bear wants to be as good as the best platform games created in the 90s

Genre: Arcade, Platform

License: Free/Open source

Cost: Free

Website: http://plee-the-bear.sourceforge.net/index-en.html

SuperTux is a classic 2D jump'n run sidescroller game in a style similar to the original Super Mario games covered under the GPL.

Genre: Arcade, Platform

License: Free/Open source

Cost: Free

Website: http://supertux.lethargik.org/

Ollie the Oligocheata is a worm on a mission He is on a mission to bring mouse controlled platforming fun to everyone! The latest in innovative mouse controlled platform gaming featuring a unique fusion of platform and match three gaming mechanics.

Genre: Arcade, Platform

License: Free/Open source

Cost: Free

Website: http://www.charliedoggames.com/?page_id=62

Frozen Bubble is a game in which you throw colorful bubbles and build groups to destroy the bubbles. In one-player mode, you must destroy all the bubbles to access the next level. In multi-player modes, the goal is to have your opponent die before you. Local one-player and two-player modes are supported, and networked play is supported for modes ranging from two to five players.

Genre: Arcade, Puzzle

License: Free/Open source

Cost: Free

Website: http://www.frozen-bubble.org/

Zaz is a game where the player has to get rid of incoming balls by arranging them in triplets. The idea of the game is loosely based on games like Luxor, Zuma and Puzzle Bobble. The twists that make Zaz stand out from other games of this type are that the balls have to be picked from the path (insted of being randomly assigned for the player) and that the player’s “vehicle” is also attached to a path which is different from level to level.

Genre: Arcade, Puzzle

License: Free/Open source

Cost: Free

Website: http://www.phuzzboxmedia.com/index.php/games/open-sourced-zaz

Amoebax is a cute and addictive action-puzzle game. Due an awful mutation, some amoeba's species have started to multiply until they take the world if you can't stop them. Fortunately the mutation made then too unstable and lining up four or more will make them disappear.

Follow Kim or Tom through 6 levels in their quest to prevent the cute multiplying amoebas to take the world and become the new Amoeba Master. Watch out for the cute but amoeba's controlled creatures that will try to put and end to your quest.

Amoebax is designed with levels for everyone, from children to adults. With the training mode everybody will quickly become a master and the tournament mode will let you have a good time with your friends. There is also catchy music, funny sound effects, and beautiful screens that sure appeal to everyone in the family.

Genre: Arcade, Puzzle

License: Free/Open source

Cost: Free

Website: http://www.emma-soft.com/games/amoebax/

Secret Maryo Chronicles is an Open Source two-dimensional platform game with a design similar to classic computer games. SMC has computer support to a great degree by using an accelerated Open Graphics Library for the best possible graphic design and stock performance.

Genre: Arcade, Platform

License: Free/Open source

Cost: Free

Website: http://www.secretmaryo.org/

Mega Mario is a Super Mario Bros. 1 clone. It features everything the original features - with better graphics, higher resolution, smoother movement and new levels. The story of mario and Luigi continues in old-school style.

Genre: Arcade, Platform

License: Free/Open source

Cost: Free

Website: http://www.megamario.de/

TuxTyping is an educational typing tutor for kids starring Tux, the Linux penguin. This educational game comes with two different games for practicing your typing, and having a great time doing it.

Genre: Educational

License: Free/Open source

Cost: Free

Website: http://tux4kids.alioth.debian.org/tuxtype/index.php