Shift-Two

Rise of the Reds is one of the most extensive and well-known mods for C&C: Generals Zero Hour, which adds two new factions and updates existing ones, introduces modern and near-future technology, new abilities and technologies, improved AI, as well as new maps for skirmishes and multiplayer.

Half-Life: Operation Rosenberg is a single-player modification for Half-Life and Opposing Force, in which you take on the role of Corporal Timothy Collins, a HECU Marine tasked with finding Dr. Rosenberg and traveling with him to the secret sector A-99 of the research complex.

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.

FlatOut Online Play Support is a plugin that restores online functionality in FlatOut without the need for VPNs or LAN services.

Half-Life Overhaul Reanimation Pack — an addon for the Half-Life Overhaul Pack mod, adds weapons and elements from Opposing Force, as well as new animations for classic guns.