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System Shock 2

System Shock 2

1999  First-person shooter - GNU/Linux Mac OS X Microsoft Windows - cooperative  
System Shock 2 Steam Key GLOBAL is a game released on 2000-08-11. Published by Nightdive Studios.
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System Shock 2 - Wikipedia System Shock 2 is a first-person shooter action role-playing survival horror video game for Microsoft Windows, Apple OS X and Linux. The title was designed by Ken Levine and co-developed by Irrational Games and Looking Glass Studios. Originally inten ...   more on Wikipedia
SiN

SiN

1998  First-person shooter - GNU/Linux Microsoft Windows - multiplayer  Single player  
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SiN - Wikipedia SiN is a first-person shooter video game based on a modified version of the Quake II engine developed by Ritual Entertainment and published by Activision in late 1998. The game was later released over Steam platform on April 5, 2006, either as a stan ...   more on Wikipedia
Borderlands 2

Borderlands 2

2012  First-person shooter - GNU/Linux Mac OS X Microsoft Windows - multiplayer  
Borderlands 2 is a truly wacky FPS where you shoot everything that moves, kill it, loot it and move on to face another enemy. You will be able to play as one of four classes: the Siren, the Commando, the Gunzerker, and the Assassin. To truly succeed, you will have to master what your character does best. Only then you will be able to rip through the Borderlands 2 world on your way to glory. If playing solo isn't your thang, feel free to play in Co-op Online or on LAN.
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Borderlands 2 - Wikipedia Borderlands 2 is an action role-playing first-person shooter video game, developed by Gearbox Software and published by 2K Games on September 18, 2012. It is the second game in the Borderlands series and the sequel to 2009's Borderlands. The game was ...   more on Wikipedia
Doom 3

Doom 3

2004  First-person shooter - GNU/Linux Mac OS X Xbox Xbox 360 Microsoft Windows Sony PlayStation 3 - multiplayer  
Doom 3 Steam Key GLOBAL is a game released on 2004-08-03. Published by Bethesda Softworks.
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Doom 3 - Wikipedia Doom 3 (stylized as D00M3) is a science fiction survival horror first-person shooter video game developed by id Software and published by Activision. Doom 3 was first released for Microsoft Windows on August 3, 2004. The game was later adapted for Li ...   more on Wikipedia