Half-Life Alpha Mod: Vent Network Puzzle in GOLDSrc

Chain Reaction is a mod for Half-Life that adds a new story campaign telling the story of a Black Mesa complex hydroelectric power plant employee working in sector G.

Half-Life: Gold is a mod for Half-Life that features completely remade textures, updated models, and improved NPC behavior.

Half-Life: Vertigo Mod is a total conversion of Half-Life on the GoldSrc engine, recreating the atmosphere of the cut "Vertigo" level from Half-Life 2.

FlatOut 2 Steering Wheel Fix - a mod that significantly improves steering wheel functionality in FlatOut 2.

Half-Life: Dreamcast — a PC port of the unreleased Half-Life version for the Sega Dreamcast console. This version differs from the original and the later PlayStation 2 adaptation: it features modified levels, unique NPCs and objects not found in other editions, altered difficulty levels, and numerous hidden references to Dreamcast.