Deplete enemy's invasion forces and stop their offensive. When facing a large number of enemies, the only way to deter them is to use the powerful Haiphong battery.
Lt. Alex's space ship is damaged so he had to eject to land on a space platform. He knows that these platforms have some sort of intergalactic portals that can get him to his base. He resides on you to help him find it!
As the first line of defense, you must bring down everything in front of you to ensure victory. You have been equipped with four guns, including an anti-aircraft gun to assist you in trouble.
