You are a part of US Combat operation. Complete the operation by shooting targets down. You got limited time to complete the entire operation, otherwise you fail.
Defend your invasion forces from attacking ships while they retake solar systems from a malicious computer virus. Use your special vessel, the Nautilus, to manufacture ships to assist you in the battle.
Shoot your way through dangerous factory rooms and hallways, eliminate different types of enemies using powerful weapons, try to survive and find the exit on each level in this 3d shooter game.
