Some of these mods include minor or major alterations to the original game, others consist in a total conversion, i.e. Some mods are also based on cut content, featured in the released files for Half-Life, and in the leaked files for Half-Life 2. However some mods such as Garry's Mod having been turned into commercial games remain independent. Some original mods, such as Counter-Strike, Team Fortress, Day of Defeat, Ricochet, The Ship and Alien Swarm (originally a mod for Unreal Tournament 2004) have been 'adopted' by Valve and made into commercial games. The Half-Life series spawned countless mods, among which many that became highly popular in the Half-Life gaming community. HD Alyx based on Brazilian model Adriana Lima in FakeFactory's Cinematic Mod, Version 8. In-game screenshot of Black Mesa, a total conversion of Half-Life to the Source engine.
In-game screenshot of Sven Co-op, one of the oldest Half-Life mods to be still in development. An in-game screenshot from Cry Of Fear, one of the newest released Half-Life Mods from 2012.
