Stars
Software Development Kit for building your own games using the OpenRA engine.
Working sample code for the basic concepts in Minecraft and Forge.
Third party mod for OpenRA based on Tiberian Sun Firestorm, it aims to make the Forgotten, CABAL, and the Scrin playable.
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.