Each game uses different controls, most DOS games use the keyboard arrows. Some will use the mouse , "Alt" and "Space bar".
The player has the role of the robot OR-CABE-3 as it attempts to escape the enemy base and leave Earth. Starting at the deepest level of the base, where the robot has stolen the defense plans, it must evade hostile robots and travel to the surface, where an escape ship awaits. The robot OR-CABE-3 resembles a tank with a rotating gun mounted on a caterpillar-track base. The gun section is capable of flight and may be detached from the base to kill enemies or solve problems, though it loses energy while in this state. If it runs out of energy the game ends. A life is lost if the gun section is destroyed. If the base section is destroyed it is respawned at the starting location, but no lives are lost.