Half-Life

Halo: GoldSource is a mod for Half-Life that recreates the atmosphere and gameplay style of Halo, including Slayer and Firefight modes, iconic weapons and maps from the original shooter, but runs on the GoldSrc engine.

Unreal Redux is a fan-made remake of Unreal from 1998 with improved graphics, effects, and gameplay, preserving the atmosphere of the original while adding new levels, interactions, and secrets on the planet NaPali.

Diablo The Awakening is an extensive mod for the original Diablo that expands the story after the destruction of Baal and the Worldstone. It adds entirely new monsters and bosses, additional spells, quests, as well as regular and unique items — all with updated affixes and increased difficulty.

Shockwave - ROTR Addon is an addon that adds a large number of units from the Rise of the Reds mod to the corresponding factions of the Shockwave mod. Additionally, the addon adds several bonuses for other generals.

Red Alert 2: Flipped Missions is a mod for Yuri's Revenge that reverses the roles of sides in the original Red Alert 2 campaign, allowing players to play as the opponents in each mission with altered objectives and a new perspective.