A shoot'em up based on Space Invaders, where the player controls a spacecraft at the bottom of the screen moving left or right, destroying a wave of aliens above descending slowly in formation.
A 2D multi-directional shoot'em up written by John P. Shay and published by Solar Software under the name Asteroyds for the Commodore VIC-20 and later under the name Meteorite for the Commodore 16.