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: 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: Half-Life 2: Lost Coast is an additional level for the 2004 first-person shooter video game Half-Life 2. Developed by Valve, it was released on October 27, 2005, through the Steam content delivery service as a free download to owners of the Windows version 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: Minerva is an episodic series of single-player modifications for Valve's Half-Life 2. The mod was created by Adam Foster. Installments are released as each is finalized: the three releases for the Metastasis chapter have already been made, with the third installment released on October 1, 2007. Wikipedia...
Plot: Weekday Warrior is a mod for the video game Half-Life 2. It was developed by students at The Guildhall at SMU and released in its final state on 7 June 2006. Weekday Warrior received the Best Mod and best Best Singleplayer FPS Mod awards in the 2007 Independent Games Festival. Wikipedia
Plot: NeoTokyo is a multiplayer tactical first-person shooter total conversion modification of Half-Life 2 in a futuristic cyberpunk setting, created by American developer Studio Radi-8. Wikipedia
Plot: Half-Life: Source is a direct port of the original Half-Life game to Half-Life 2's Source engine, introducing graphics and AI improvements as well as some subtle level changes.
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...
Plot: Half-Life: Decay is a multiplayer-only expansion pack for Valve's first-person shooter Half-Life. Developed by Gearbox Software and published by Sierra On-Line, Decay was released as part of the PlayStation 2 version of Half-Life in 2001. Wikipedia
Plot: Half-Life 2: Deathmatch is a multiplayer first-person shooter video game developed by Valve. Released on Steam on November 30, 2004, it uses many of the assets from Half-Life 2 and its Source engine. It features new levels, optimized for multiplayer arena play, and a few new weapons. Wikipedia