Plot: Half-Life is a series of first-person shooter games developed and published by Valve. The games combine shooting combat, puzzles, and storytelling. The original Half-Life, Valve's first product, was released in 1998 for Windows to critical and commercial success. Wikipedia
Plot: Half-Life: Alyx is a 2020 virtual reality first-person shooter developed and published by Valve. Set between the events of Half-Life and Half-Life 2, players control Alyx Vance on a mission to seize a superweapon belonging to the alien Combine. Wikipedia
Plot: Left 4 Dead 2 is a 2009 multiplayer survival horror game developed and published by Valve. The sequel to Turtle Rock Studios's Left 4 Dead, it was released for Windows and Xbox 360 in November 2009, Mac OS X in October 2010, and Linux in July 2013. Wikipedia
Plot: Team Fortress 2 is a multiplayer first-person shooter game developed and published by Valve. It is the sequel to the 1996 Team Fortress mod for Quake and its 1999 remake, Team Fortress Classic. It was released in October 2007 as part of The Orange Box video game bundle for Windows and Xbox 360. Wikipedia...
Plot: Garry's Mod is a 2006 sandbox game developed by Facepunch Studios and published by Valve. The base game mode of Garry's Mod has no set objectives and provides the player with a world to freely manipulate objects in. Wikipedia
Plot: Counter-Strike: Source is a first-person shooter video game developed by Valve and Turtle Rock Studios. Released in November 2004 for Windows, it is a remake of Counter-Strike using the Source game engine. Wikipedia
Plot: Half-Life 2: Episode Two is a 2007 first-person shooter game developed and published by Valve. Following Episode One, it was the second in a planned trilogy of shorter episodic games that continue the story of Half-Life 2. Wikipedia
Plot: Black Mesa is a first-person shooter game developed and published by Crowbar Collective. It is a third-party remake of Half-Life made in the Source game engine. Wikipedia
Plot: Half-Life 2: Episode One is a 2006 first-person shooter game developed and published by Valve. Like previous Half-Life games, it combines shooting, puzzle-solving, and narrative. Players control scientist Gordon Freeman, who, alongside his companion Alyx Vance, must escape City 17 before an explosion...
Plot: Portal 2 is a puzzle-platform game developed by Valve. It was released in April 2011 for Windows, Mac OS X, Linux, PlayStation 3, and Xbox 360. The digital PC version is distributed online by Valve's Steam service, while all retail editions were distributed by Electronic Arts. Wikipedia
Plot: Team Fortress 2 is a multiplayer first-person shooter game developed and published by Valve. It is the sequel to the 1996 Team Fortress mod for Quake and its 1999 remake, Team Fortress Classic. It was released in October 2007 as part of The Orange Box video game bundle for Windows and Xbox 360. Wikipedia...
Plot: Portal is a series of first-person puzzle-platform video games developed by Valve. Set in the Half-Life universe, the two main games in the series, Portal and Portal 2, center on a woman, Chell, forced ... Wikipedia
Plot: Half-Life: Opposing Force is an expansion pack for the first-person shooter game Half-Life. The game was developed by Gearbox Software and Valve and published by Sierra On-Line for Windows on November 19, 1999. Opposing Force was the first expansion for Half-Life and was announced in April 1999. Wikipedia...