Plot: They Hunger is a single player horror mod for Half-Life developed by Black Widow Games. It is divided into three chapters, which were distributed on the internet over a span of three years. Current distributions of the game include all three chapters.
Plot: Half-Life: Echoes is a game modification of Half-Life created by British developer James MrGnang Coburn, released on August 10, 2018. The mod was under development for four years and uses the GoldSrc engine. Wikipedia
Plot: Science and Industry is a multiplayer, teamplay mod for the video game Half-Life. It is one of the oldest Half-Life mods and has been described as a classic one. The current version of the game is 1.4 beta 14, released on January 19, 2019. The game was first publicly released on July 31, 1999, as version...
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: Gunman Chronicles or Half-Life: Gunman is a first-person shooter space western video game originally created as a mod by the now defunct Rewolf Software. Gunman Chronicles was originally a Quake deathmatch mod named Gunmanship 101, then it was moved to Quake II's engine before becoming a Half-Life...
Plot: Action Half-Life is a mod for the first-person shooter video game Half-Life. It strives to simulate action movies, especially those directed by John Woo. Action Half-Life is the second mod in the Action series. The first was Action Quake 2 and the third was Action Unreal Tournament 2004. Wikipedia
Plot: Afraid of Monsters: Director's Cut is a mod for Half-Life developed by Team Psykskallar, known for its infamous horror aspects. It is a major update of the mod Afraid of Monsters.