Demons to Diamonds - Atari 2600

Complete Atari 2600 Game Library (252 items)
list by Prelude

Atari 2600 (284 items)
list by diabolical dr voodoo

This is one of those games that must have been envisioned during someone's drug trip. Basically, you shoot the demons, some of which then turn into diamonds. You shoot the diamonds to get bonus points. But some of the demons when shot turn into skulls that try to shoot you. In the two player game, your cannon sits opposite your opponent. You can shoot demons, or you can shoot your opponent. I prefer the latter.