The first version of the engine was known as W3D ("Westwood 3D") was highly modified version of SurRender 3D engine, developed by Hybrid Graphics Ltd. Westwood used W3D for Emperor: Battle for Dune and updated for Command & Conquer: Renegade. After Westwood was bought by Electronic Arts the engine was further updated and renamed to SAGE. SAGE is still being used today in EA's RTS games.
This is the most recent full version of the game (Beta + Patch 2). It comes with the new launcher and manual in addition to everything else. If you are...