This game consists of a two-player cooperative game in which both players work together to shoot and destroy as many invading alien ships as possible without getting killed. Players must fight off three different types of enemy ships. Red alien ships are the most numerous. Their mission is to try and ram the player's jets. Blue Alien ships behave like red ships, except that sometimes fire missiles. The green ship is the alien's mother-ship and it hovers up and down repeatedly firing its weapons until one of the player's jets is destroyed. Game ends when one of the player's jets is destroyed or when the alien mother ship is hit with multiple bullets.