Half-Life: Decay is Back! - 25 Year Anniversary Update
Recommended Files

Earl and HenryStronghold: Crusader (2002)
Earl and Henry - an add-on that adds two new lords: Earl Mangonel, replacing/fixing Philip, and Henry V, replacing Saladin.

WT Detail TexturesHalf-Life (1998)
WT Detail Textures — a texture pack for the Half-Life: WANTED! mod, including works by different authors. It contains new textures for all story missions and standard multiplayer maps.

Sweet Half-LifeHalf-Life (1998)
Sweet Half-Life is one of the most famous story mods for Half-Life, offering a new campaign with an original story, anime elements, weapons, controllable vehicles, and even an alternative ending.

Half-Life: Field IntensityHalf-Life (1998)
Half-Life: Field Intensity is a large-scale modification for Half-Life that adds a new campaign and covers events from the arrival of the military at the Black Mesa research facility to the nuclear explosion, offering an alternative perspective on the disaster.

Half-Life eXperimentHalf-Life (1998)
Half-Life eXperiment - a story mod for Half-Life where you find yourself in an experimental research complex with unconventional map design: narrow corridors, labs with unusual architecture, and scenes built to maintain tension. Less large open spaces, more claustrophobia and survival.

Diablo: The Hell 4Diablo (1996)
Diablo: The Hell 4 is the fourth entry in the The Hell mod series – a complete overhaul of the original Diablo. It features additional fixes, new content, new features, new game modes, and new classes.