Code Red: The Martian Chronicles

The Martian Chronicles picks up some years later[ After Code Red: Battle for Earth]. Now a decorated officer for your efforts on Earth, you have been sent to Mars to investigate the disappearance of combat troops. It appears a new leader has assumed control, codenamed "Big Brain", and is massing a new army. Your mission is to find him, and put a stop to his plans. Along the way, you'll see incredible Martian facilities and landscapes, and horrors that you could have never imagined.