Classic Half-Life train corridor scene showcased in Half-Life: Gold mod

Half-Life Decay is an updated version of the mod that ports the cooperative expansion Half-Life: Decay, originally released only on PlayStation 2, to PC. It fixes bugs and improves visual and sound effects. The mod allows you to play through the entire campaign in its original form, solo or in co-op.

The Second Tiberium War is a global mod for Tiberian Sun that enhances all aspects of the game and offers a completely new story campaign where the fates of GDI, Nod, and mutants intertwine against a backdrop of political intrigue and the Brotherhood's revival.

Opposing Force Redux is a large-scale mod for Half-Life: Opposing Force that completely overhauls the graphics and sound. New models, sprites, sounds, and refined maps bring the game's audiovisual elements up to modern standards.

Half-Life: Urbicide is a mod with 11 atmospheric maps for single-player gameplay. The events take place during the Xen invasion of Earth. You take on the role of Bruce, a warehouse manager trapped inside a building with a colleague, while his fiancée Rebecca attempts to rescue him.

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.