- INSERT COIN (S) INTO SLOT.
- SELECT 1 OR 2 PLAYER BUTTON.
- MOVE THE SPACESHIP RIGHT AND LEFT, DODGING FROM ATTACK OF PHOENIX AND DESTROYING IT BY FIRING BUTTON.
- SHELTER SPACESHIP BY PRESSING FORCE FIELD BUTTON.
- ADDITIONAL SPACESHIP IS ADDED WHEN BONUS SCORE IS ACHIEVED.
- THE GAME IS OVER WHEN ALL THE SPACESHIPS HAVE BEEN DESTROYED.