Half-Life mod Shift-Two shows a security guard in a sci-fi lab room

A fan-made port of the early alpha version of Half-Life to the classic GoldSrc engine, featuring updated maps and content.

Scorched Earth is a large-scale overhaul of Red Alert 2 that preserves the canon while making factions more unique, adding new units, and improving balance. The AI has become extremely tough, and weapons more deadly. New maps, objects, and terrain elements have also been added.

An unofficial update for Stronghold: Crusader created by a community of enthusiasts. It aims to fix bugs, improve AI, balance units, and expand modding capabilities.

An add-on that updates weapon and character animations in They Hunger, making them smoother and more detailed while preserving the original atmosphere.

Dawn of the Tiberium Age is a mod for Tiberian Sun that allows you to play Red Alert and Tiberian Dawn using the advantages of the more modern Tiberian Sun engine.