You are a member of the elite anti-terrorist squad. In addition to your impressive array of equipment, you'll need a keen eye and sharp reactions if you are to eliminate the terrorist cells you will encounter.
Blow apart big waves of zombies using an array of guns and hired buddies to fight by your side. Purchase bigger and better guns and hire assistance with big firepower to give those hoards of zombies a good spanking, keeping them away of your territory.
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.