Classic Doom 1993 gameplay showing player fighting with plasma rifle

Sweet Half-Life: Relit is an unofficial remaster of the Sweet Half-Life mod that makes it compatible with new versions of the game and includes reworked maps, weapons, monsters, effects, and much more.

Edge of Darkness is a single-player mod for Half-Life where Gordon Freeman is sent by the A.C.I.B. organization to a secret mountain base to stop a new threat. The mod combines dynamic combat, atmospheric locations, and cinematic events.

Earl and Henry - an add-on that adds two new lords: Earl Mangonel, replacing/fixing Philip, and Henry V, replacing Saladin.

Half-Life: Deep Cover is a mod for Half-Life in which you play as a Black Operations operative infiltrating a base seized by deserting H.E.C.U. soldiers. New weapon models, an inventory system, puzzles, a varied enemy roster, and a full story with voiced characters.

FlatOut 2 Time Trial Ghosts is a plugin that adds a ghost in time trial mode in FlatOut 2 and simultaneously removes all bots and destructible objects on the track, so nothing prevents you from setting fast laps.