Post your own recommendations, and I'll pop em in! + Check out [GoL's List!](https://www.gamingonlinux.com/free-games/)

#Free Linux Games: 

**Strategy / Tactics:**

* [FreeCiv](http://www.freeciv.org/) - Free clone of Civilization

* [FreeCol](http://www.freecol.org/news/freecol-0.11.6-released.html) - Clone of Colonization

* [FreeOrion](http://www.freeorion.org/index.php/Main_Page) - Clone of Master of Orion

* [OpenRA](http://www.openra.net/) - Open-Source implementation of C&C: Red Alert, Tiberian Sun, and Dune 2000

* [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/) - Open-source turn-based fantasy RPG/Strategy hybrid

* [Hedgewars](http://www.hedgewars.org/) - Clone of the game Worms

* [UFO: Alien Invasion](https://ufoai.org/wiki/News) - Turn-based tactical combat game inspired by the X-Com series

* [Argentum Age](http://www.argentumage.com/) - Open-source fantasy card game

* [UFO2000](http://ufo2000.sourceforge.net/) - Another X-Com inspired game

* [Wyrmsun](https://andrettin.github.io/) - An interesting fantasy RTS

* [0 A.D.](https://play0ad.com/) - Incredible 3D RTS, professional grade **(Not suitable for low-end systems)**

* [Spring RTS](https://springrts.com/) - RTS game engine that has a few complete games made from it, like Zero-K

* [Warzone 2100](https://wz2100.net/) - 3D RTS that offers campaign, multi-player, and single-player skirmish modes.

* [Megaglest](https://megaglest.org/) - RTS, control armies of seven different factions

* [Thrive](http://revolutionarygamesstudio.com/releases/) - Centered around evolution

**City Builder/Tycoon:**

* [OpenTTD](https://www.openttd.org/en/) - Clone of Transport Tycoon Deluxe

* [Unknown Horizons](http://unknown-horizons.org/) - Village builder inspired by the Anno series

* [Scorched 3D](http://www.scorched3d.co.uk/) - Turn-based or real-time artillery strategy game

* [Simutrans](https://www.simutrans.com/en/) - Transportation simulator clone.

* [Widelands](https://wl.widelands.org/) - Settlers clone

**Adventure/RPG:**

* [Heroine's Quest](http://crystalshard.net/?g=16) - Fantastic Point'n'Click RPG inspired by the Quest for Glory series from Sierra

* [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

* [ScummVM's Freeware Games](https://www.scummvm.org/games) - Some fantastic point'n'click games here, my favourite 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/)

* [Flare](http://flarerpg.org/) - A surprisingly in-depth and polished isometric RPG

* [Eldevin](https://www.eldevin.com/) - F2P Runescape clone with a distinct charm

**Roguelikes:**

* [Dwarf Fortress](http://www.bay12games.com/dwarves/) - Famous RL/City-builder. Extremely daunting to get into, but very rewarding **(Needs Good CPU)**

* [Roguebox Adventures](https://rogueboxadventures.tuxfamily.org/) - Graphical RL with a focus on survival and crafting. [(Source code)](https://notabug.org/themightyglider/RogueBoxAdventuresMirror)

* [Cataclysm: Dark Days Ahead](https://cataclysmdda.org/) - Unique zombie survival RL, very thrilling to play.

* [UnReal World](http://www.unrealworld.fi/) - Crazy in-depth survival RL based in iron age Finland

* [Dungeon Crawl Soup](https://crawl.develz.org/) - RL to find the mystifyingly fabulous Orb of Zot.

* [NetHack](https://www.nethack.org/) - Does this need an introduction?

* [Brogue](https://sites.google.com/site/broguegame/home) - RL for Visually Impaired?

* [Tales of Maj'Eyal](https://te4.org/) - Ultra polished graphical RL

* [ASCII Sector](http://www.asciisector.net/) - RL version of WC: Privateer

* [ADOM (Ancient Domains of Mystery)](https://www.adom.de/home/index.html) - Another great RL with a huge world

* [DoomRL](https://drl.chaosforge.org/) - DOOM, but RL!

* [Sil](http://www.amirrorclear.net/flowers/game/sil/) & [Angband](http://rephial.org/) - Tolkien RL's

**Space Sim/Trading/RPG:**

* [Ur-Quan Masters](http://sc2.sourceforge.net/) - Updated version of Star Control II. Be sure to get the Voice Pack! ([Alternative HD version available here](https://sourceforge.net/projects/urquanmastershd/))

* [Endless Sky](https://endless-sky.github.io/) - 2D space trading and combat game similar to the classic Escape Velocity series

* [Oolite](http://www.oolite.org/) - Elite remake, with plentiful mod support

* [Pioneer](http://pioneerspacesim.net/#&panel1-1) - Remake of the sequel to Elite, Frontier

* [Vega Strike](http://vegastrike.sourceforge.net/) - 3D Action-Space-Sim

* [Naev](https://store.steampowered.com/app/598530/Naev/) - Centered on space exploration, trade and combat


**Puzzle:**

* [FloboPuyo](http://www.ios-software.com/flobopuyo-en) - Clone of PuyoPuyo [(Source-code)](http://www.fovea.cc/files/flobopuyo)

* [Frozen Bubble](http://www.frozen-bubble.org/home/) - Clone of Puzzle Bobble.

* [Duck Marines](http://tangramgames.dk/games/duckmarines/) - Clone of Chu Chu Rocket [(Source code)](https://github.com/SimonLarsen/duckmarines)

* [Pingus](https://pingus.seul.org/) - Lemmings clone.

* [Portable Puzzle Collection](https://www.chiark.greenend.org.uk/%7Esgtatham/puzzles/) - 39 old school puzzle games

* [Blockout2](http://www.blockout.net/blockout2/) - 3D Tetris

* [Coregrounds](https://store.steampowered.com/app/649770/Coregrounds/) - Online Competitive Tower-Defense

**Arcade/Casual:**

* [SSVOpenHexagon](http://vittorioromeo.info/projects.html) - Clone of Super Hexagon [(Source code)](https://github.com/SuperV1234/SSVOpenHexagon)

* [LBreakout2](http://lgames.sourceforge.net/LBreakout2/) - Breakout clone

* [Witch Blast](https://dev.solus-project.com/T1335) - Clone of Binding of Isaac. [(Source code)](https://github.com/Cirrus-Minor/witchblast)

* [TeeWorlds](https://store.steampowered.com/app/380840/) - Online 2D shooter

* [OpenTyrian](https://bitbucket.org/opentyrian/opentyrian/wiki/Home) - Famous Shmup

* [Kobo Deluxe](http://olofson.net/kobodl/) - 8-way shooter

* [Chromium-BSU](http://chromium-bsu.sourceforge.net/) - Top-down arcade Shmup

* [Altitude](https://store.steampowered.com/app/41300/Altitude/) - 2D Online plane combat

* [Liero](http://www.liero.be/) - Kind of like a real-time version of Worms

* [Frets on Fire](http://fretsonfire.sourceforge.net/) - Guitar Hero clone

**Side-Scroller:**

* [Mr. Rescue](http://tangramgames.dk/games/mrrescue/) - Play as a fireman rescuing people. [(Source code)](https://github.com/SimonLarsen/mrrescue)

* [Sienna](http://tangramgames.dk/games/sienna/) - Fun little runner/platformer [(Source code)](https://github.com/SimonLarsen/sienna) 

* [Super Tux](http://www.supertux.org/) - Mario clone, and [currently in need of help](https://www.reddit.com/r/linux_gaming/comments/8tmc1x/classic_open_source_game_super_tux_seeking_help/)

* [Secret Chronicles](https://secretchronicles.org/en/) - Mario 3 Clone

* [Hurrican](https://www.winterworks.de/project/hurrican/) - Inspired by Turrican. Mostly forgotten now, so [you may have to compile it from here](https://sourceforge.net/p/hurrican/code/HEAD/tree/trunk/)

* [Frogatto](https://frogatto.com/) - Platformer with great music and graphics. Available in the Ubuntu repo

* [Commander Keen 4](https://davidgow.net/keen/omnispeak.html) - Classic DOS platformer

* [OpenClonk](https://www.openclonk.org/) - Online 2D Mining game

**Racing:**

* [SuperTuxCart](https://supertuxkart.net/Main_Page) - Open-source clone of the Mario Cart games

* [Yorg](http://www.ya2.it/pages/download.html#download) - A top-down racer in the Micro Machine's style.

* [Speed Dreams](http://speed-dreams.org/) - Realistic racing sim

**First Person Shooter/Stealth:**

* [Cube 2](http://sauerbraten.org/) - Quake-like Arena online FPS with multiple game modes

* [Assault Cube](https://assault.cubers.net/) - Counter-Strike-like in the Cube engine

* [Xonotic](http://www.xonotic.org/) - Quake-like Arena online FPS

* [Warsow](https://warsow.net/) - cartoonish online FPS

* [FreeDoom](https://freedoom.github.io/download.html) - Best used with Chocolate Doom

* [Dystopia](https://store.steampowered.com/app/17580/Dystopia/) - A cyberpunk online FPS

* [Urban Terror](https://www.urbanterror.info/home/) - Fast paced online FPS reminiscent of Counter-Strike

* [OpenArena](http://openarena.ws/smfnews.php) - Online arena FPS using the id tech engine

* [Fistful of Frags](https://store.steampowered.com/app/265630/Fistful_of_Frags/) - Online Western FPS

* [Ravenfield](https://steelraven7.itch.io/ravenfield) - Singleplayer Battlefield type game

* [Termulous](http://www.tremulous.net/) - RTS/FPS Hybrid with aliens!

* [Alien Arena](http://red.planetarena.org/) - Retro Sci-Fi Online FPS

* [Red Eclipse](https://www.redeclipse.net/) - Online FPS with parkour

* [ET Legacy](https://www.etlegacy.com/) - Wolfenstein: Enemey Territory for modern systems

* [Team Fortress 2](https://store.steampowered.com/app/440/Team_Fortress_2/) - class-based online FPS **(Not suitable for low-end systems)**

* [The Dark Mod](http://www.thedarkmod.com/) - Fan-made spin-off the the fantastic Thief series **(Not suitable for low-end systems)**

**Minecraft Clones:**

* [Minetest](https://www.minetest.net/) - Uses C++, Requires mods to be fun

* [TrueCraft](https://github.com/SirCmpwn/TrueCraft) - Clean-room implementation of Minecraft 1.7.3

* [Voxelands](https://www.voxelands.com/) - standard clone?

* [Terasology](https://terasology.org/) - Fancy lookin' Minecraft

**Vehicle Combat:**

* [Warthunder](https://warthunder.com/en) - WWII Flight/Dogfighter/Tanker Sim