Linux / GNU games

Minecraft — retro-style video game, sandbox game, survival game, construction and management simulation, action-adventure game (2011)

Half-Life — science fiction video game, first-person shooter (1998)

Team Fortress 2 — first-person shooter (2007)

Pac-Man — maze video game (1980)

Q163628 — tactical shooter, first-person shooter (2000)

Half-Life 2 — science fiction horror, post-apocalyptic video game, science fiction video game, first-person shooter (2004)

Dota 2 — multiplayer online battle arena, action game, real-time strategy (2013)

Q842146 — action game, first-person shooter (2012)

Portal — science fiction video game, first-person shooter, puzzle video game (2007)

The Sims — video game with LGBT character, life simulation game (2000)

Doom — arcade, horror video game, science fiction video game, first-person shooter (1993)

Second Life — massively multiplayer online social game, erotic video game, massively multiplayer online game, virtual world (2003)

Undertale — comedy video game, video game with LGBT character, role-playing video game, bullet hell, puzzle video game (2015)

Portal 2 — science fiction video game, post-apocalyptic video game, first-person shooter, puzzle video game (2011)

Terraria — sandbox game, role-playing video game, action-adventure game (2011)

Euro Truck Simulator 2 — business simulation game, truck simulation video game (2012)

Q15712701 — computer wargame, grand strategy wargame, strategy game, wargame (2016)

Q217423 — science fiction video game, first-person shooter (1996)

War Thunder — flight simulation video game, tank simulation game, massively multiplayer online game, action game (2012)

Left 4 Dead 2 — horde shooter, post-apocalyptic video game, survival horror, first-person shooter (2009)

Stardew Valley — farm life sim (2016)

The Battle For Wesnoth — turn-based strategy video game (2003)

Sonic the Hedgehog — platform game (1991)

Cities: Skylines — strategic game, construction and management simulation, simulation video game, city-building game (2015)

Tomb Raider — action-adventure game (2013)

Civilization V — turn-based strategy video game, 4X (2010)

Life Is Strange — video game with LGBT character, LGBT-themed video game, science fiction video game, graphic adventure game, interactive film (2015)

Europa Universalis IV — historical video game, computer wargame, grand strategy wargame, real-time strategy (2013)

Outlast — survival horror (2013)

Mount & Blade — action role-playing game (2008)