A single marine crash lands on an alien planet. You mission is to destroy the bio-mechanical enemy and the big gun.
The player is a Marine named Bitterman taking part in "Operation Overlord," in a desperate attempt to stop the alien invasion of the Strogg. Bitterman is the only survivor of his team and must fight off the hostile Strogg alone. Can he defeat the leader of the Strogg- Makron?—Christopher Tiske