Death Balls are the physical copies of games made to be played on the Death Drive Mk II. The balls themselves were created by Frank, and their games created by his associate, Dr. Juvenile.
There were only 7 Death Balls made for the Death Drive II system:
Beating all these games allowed the player to make one wish - Badman would go on to wish his daughter back to life...however, she would first be reincarnated as a dog.