Metal Storm(1991)

Battle station cyberg's massive computer that keeps peace throughout the solar system is no longer user friendly. It's gone wildly out of control. The LaserGun it operates has already destroyed Neptune. Earth is its next target. As a high-tech hot shot, you must enter Cyber's core and activate the system's self-destruct mechanism. Mankind is reyling on your know-how and toughness to see this thing through. But time is running out...