Demon Seed is a clone of the arcade game Phoenix, and includes all 5 levels from the original arcade game. It allows both keyboard or joystick play, and basically involves you going through four waves of aliens (the ones on level's 3 & 4 can get wounded, and can grow their wings back), before you get to level 5 and have to take on the mother ship.
Title: Demon Seed
Author: Jeffrey Sorensen and Philip Mackenzie
Publisher: Computer Shack/Michtron
Released: 1983
Requires: Color Computer 1,2,3, 32K RAM, cassette or disk.