Dark hospital ward corridor in They Hunger Relit mod for Half-Life 1998

Half-Life: The Infected is a mod that adds a new 28-map campaign for Half-Life. In it, you play as an electrical intern named Gerald Backman, who finds himself at the epicenter of a resonance cascade and faces horrors from the Xen world, as well as the sinister Race X.

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.

Half-Life: ReSrced is a mod for Half-Life, Opposing Force, and Blue Shift that adds AI-enhanced HD textures and supports various HD packs. Powered by the Xash3D FWGS engine, it makes the classic game look sharp and modern while preserving the original aesthetic.

Serflings is a remake of the classic strategy The Settlers 1 (or Serf City), faithfully reproducing the original gameplay while adding modern conveniences: support for high resolutions, network games, compatibility with original save files, and much more.

REBELLION: Brutalized - an adaptation of the Rebellion mod for Brutal Half-Life. The game features some weapons and items from Brutal Half-Life, as well as soldiers armed with M4A1, M249, and sniper rifles.