Shoot the asteroids while avoiding collisions with them. Occasionally a flying saucer will appear and attempt to shoot you down with guided missles. Destroy it or the missles for more points. You begin with three ships, a bonus ship is awarded for every 5000 points scored. our mission is to simply go to an assigned area of space and clear the area of asteroids and the occassional debris. The game consists of five zones, each with a different background and some with special features. Each zone has 15 levels. In addition to the standard asteroids, there are also mined asteroids that explode; indestructible asteroids that are, well, indestructible; fireball comets; crystal asteroids that regenerate; alien egg asteroids containing deadly baby space worms; and ancient energy asteroids that shoot back! And there's plenty of enemies in addition to the asteroids, such as Standard and Super Saucers, Asteroids Tugs, Fuel Transports, Hexes, Nuke Drivers, and Vulturoids.