Half-Life: Opposing Force
1999 First-person shooter -
- multiplayer 
Half-Life: Opposing Force is an expansion pack for Valve Software's science fiction first-person shooter video game Half-Life. The game was developed by Gearbox Software and Valve Corporation and published by Sierra Entertainment on November 19, 1999 ...
more on Wikipedia15 Games like Half-Life: Opposing Force - Microsoft Windows - Mac OS X - GNU/Linux
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Half-Life: Blue Shift
2001 First-person shooter -
Half-Life: Blue Shift is an expansion pack for Valve Software's science fiction first-person shooter video game Half-Life. The game was developed by Gearbox Software with Valve Corporation and published by Sierra Entertainment on June 12, 2001 (it wa ...
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Team Fortress 2
2007 First-person shooter - 
- multiplayer
Team Fortress 2 is a team-based first-person shooter multiplayer video game developed by Valve Corporation. It is the sequel to the 1996 mod Team Fortress for Quake and its 1999 remake. It was released as part of the video game compilation The Orange ...
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Savage 2: A Tortured Soul
2008 RPG, Strategy, First-person shooter -
Savage 2: A Tortured Soul is a fantasy and science fiction themed video game that combines elements of the first-person shooter, real-time strategy, and action role-playing game genres. It is developed and published by S2 Games. It is the sequel to S ...
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Tremulous
2005 Strategy, First-person shooter -
Tremulous is a free and open source team-based first-person shooter with real-time strategy elements. ...
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Return to Castle Wolfenstein is a timeless classic developed by Grey Dog, that has you lead the way on a quest to stop Nazi Germany and ruin their evil plans! In single player mode you seek to strike the Third Reich to their core by gunning down Heinrich Himmler, the head of SS. Join other players in multiplayer mode and form your own Allied force to fight the Nazis in WWII!
Return to Castle Wolfenstein is a first-person shooter video game published by Activision and originally released on November 19, 2001 for Microsoft Windows and subsequently for PlayStation 2, Xbox, Linux and Macintosh. The single player game was dev ...
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Half-Life 2: Episode One
2006 First-person shooter -
Half-Life 2: Episode One is a first-person shooter video game, the first in a series of episodes that serve as the sequel for the 2004 Half-Life 2. It was developed by Valve Corporation and released on June 1, 2006. Originally called Half-Life 2: Aft ...
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Medal of Honor: Allied Assault
2002 First-person shooter - - multiplayer
Medal of Honor: Allied Assault (abbreviated MoH:AA) is a 2002 first-person shooter video game developed by 2015, Inc. It was published by EA Games and officially released for Microsoft Windows on January 22, 2002 in North America and on February 15, ...
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Kingpin: Life of Crime
1999 First-person shooter -
Kingpin: Life of Crime is a first-person shooter developed by Xatrix Entertainment (now a part of Treyarch) and published by Interplay Entertainment in June 1999. The game begins with the player character wounded and beaten up by the Kingpin's henchm ...
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Half-Life 2
2004 First-person shooter - 
Half-Life 2 (stylized as HλLF-LIFE2) is a first-person shooter video game and the sequel to Half-Life. Developed by Valve Corporation, it was released on November 16, 2004, following a protracted five-year $40 million development, during which a s ...
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BioShock Infinite: Burial at Sea
2013 First-person shooter -
BioShock Infinite: Burial at Sea is an episodic expansion sequel to the first-person shooter video game BioShock Infinite, and a prequel to the original BioShock, and was developed by Irrational Games, and published by 2K Games. It is available on Li ...
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America's Army
2002 First-person shooter - - Training and
America's Army is the name given to a game technology platform used to develop first person shooter (FPS) games published in 2002 by the U.S. Army. The game is branded as a strategic communication device, designed to allow young Americans to virtuall ...
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Doom 3 Steam Key GLOBAL is a game released on 2004-08-03. Published by Bethesda Softworks.
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 ...
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Tribes 2
2001 First-person shooter - - multiplayer
Tribes 2 (abbreviated as T2) is a sci-fi first-person shooter multiplayer video game developed by Dynamix and published by Sierra Studios in 2001 as sequel to Starsiege: Tribes. ...
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CodeRED: Alien Arena
2004 First-person shooter - - multiplayer
Alien Arena (initially CodeRED: Alien Arena) is a free, stand-alone first-person shooter computer game. Begun by COR Entertainment in 2004, the game combines a 1950s-era sci-fi atmosphere with gameplay similar to the Quake, Doom, and Unreal Tournamen ...
more on WikipediaHalf-Life: Opposing Force
1999 First-person shooter - - multiplayer
Half-Life: Opposing Force is an expansion pack for Valve Software's science fiction first-person shooter video game Half-Life. The game was developed by Gearbox Software and Valve Corporation and published by Sierra Entertainment on November 19, 1999 ...
more on Wikipedia