After Dr. Carter gets captured by the aliens, you must make your way through mazes and buildings to find her. When you do, her father, who has turned into an alien himself, sends a war drone after you, The best way to defeat it is to destroy the laser arm on the left, followed by the one on the right. Every now and then, pick up the items lying around. Once they are gone, destroy the Drone. If the laser arm starts to fire at you, or the drone brings out its machine guns, just press Triangle to use your shields.