Command & Conquer 3: WORLDBUILDER

Command & Conquer (often abbreviated as C&C or CnC) is a series of computer games, mostly of the real-time strategy style as well as a single first-person shooter game based on the former. The Command and Conquer series was initially developed by Westwood Studios from 1995 – 2003, and later by EA Games from 2003 to the present.
NB: This is the 'WorldBuilder' or 'Map Editor' and not the full game.