The object of the game is to destroy the Galaxian fleet before they blast your Galaxip to stardust. The enemy fleet lines up in ranking order before plunging down to bombard your Galaxip. If a Galaxian survives a bombing run, he returns to his original position in the convoy. You begin the game with three Galaxips and score points for each Galaxian destroyed with your missiles. You earn extra points for destroying a Galaxian in flight, and at 7,000 points you receive a bonus defense ship. The Galaxian fleet attacks in waves. Each time you manage to destroy an entire wave, another, fiercer wave is launched.