Stop the robots from stealing the reactor core containers of the aliens! The robots will self-detonate when they collide with you. Keep them away as long as you can! The goal is to destroy as many robots as you can and collect the bolts they leave behind for points. Attract with X key. You acquire a special shot by hitting a robot that displays an icon. You complete a stage when the timer reaches zero and there is at least one container left. You lose a life for each container that the robots steal. Lose all lives and it is game over!
Rotate the turret by pressing LEFT or RIGHT on the keyboard. Press Z to fire a regular shot. Press X to fire a special shot. Change the camera angle by pressing UP or DOWN on the keyboard.
Whatever happens, do not panic! Keep your head cool and a finger on the trigger. Twist around to make sure robots do not sneak up from behind. Use special shots wisely … you will need them!