Command & Conquer Generals mod shows aircraft hangar with large passenger plane

Contra is one of the oldest and most popular mods for C&C: Generals Zero Hour. It adds new generals, numerous units, buildings and abilities, improves graphics and AI, introduces a rank system, new maps, sounds and much more, making the game deeper and more diverse while preserving the spirit of the original.

Diablo: The Hell is one of the most extensive mods for the original Diablo, aimed at hardcore players. It significantly expands the game: adds hundreds of new items, monsters, spells, and quests, fixes bugs, restores cut content, adapts to modern systems, and preserves the classic atmosphere.

Stronghold Witcher is a thematic mod for Stronghold: Crusader that brings characters and the atmosphere of The Witcher 3: Wild Hunt universe into the game.

Global Crisis is a mod for Yuri's Revenge inspired by Tiberian Sun and Tiberian Dawn. Using the most modern development tools, the mod tells a story about the modern world and contemporary military conflicts involving real countries and their armies in an apocalyptic world engulfed in chaos due to Tiberium and humanity's actions.

Half-Life: Absolute Zero is a Half-Life mod that aims to recreate the early ideas and plans of the original developers, as seen in the builds from late 1997 to early 1998. It brings back cut chapters, visual style, monsters, and weapons with careful polish and attention to detail.