The Troopers have invented a new robot, GALILEO, to assist Professor Hart in the lab. His memory banks hold all the knowledge of the lab's computer. Grimlord kidnaps the robot and begins extracting information in order to crush the Troopers. But the Troopers have a plan...they follow Doom Master back to the Dark Fortress and rescue the robot. There, they find that Grimlord has stolen nearly all the robot's information. Troopers rescue Galileo and set Grimlord's computers to self-destruct. As they leave, Grimlord's chamber goes up in flames.