Asteroids

As an employee of the Astro-Mining Corporation, the assignment is straightforward: clear a sector of space of asteroids. Five zones, fifteen levels each, with different backgrounds and special features in each zone. The asteroids themselves vary — standard rocks, mined ones that explode, indestructible ones, fireball comets, crystal asteroids that regenerate, egg asteroids containing baby space worms, and ancient energy asteroids that fire back. Among the non-asteroid threats: standard and super saucers, asteroid tugs, fuel transports, hexes, nuke drivers, and vulturoids.