SFTtech/openage

Open Source real-time strategy game engine for early Westwood games such as Command & Conquer: Red Alert written in C# using SDL and OpenGL. Runs on Windows, Linux, *BSD and Mac OS X.

fheroes2 is a recreation of Heroes of Might and Magic II game engine

Main game repository for Beyond All Reason.

Command and Conquer: Generals - Zero Hour

A list of open source games.

Improved version of the X-Ray Engine, the game engine used in the world-famous S.T.A.L.K.E.R. game series by GSC Game World. Join OpenXRay! ;)

Open-source engine for Heroes of Might and Magic III

Ant game engine

Command & Conquer: Remastered Collection