Pray for Death

Type the following on the credits screen:
Code         Result
————————————
MEETTHEGUYS   - Start the subgame, winning it supposedly adds
            extra features
SENDMEFASTER   - Faster game
NEEDNOBATTERIES - See what the reaper does when there are no live
            fights..
TOONSOUND     - Game sound’s like cartoon
wizardrules   - Fight as Death
greatwhiteguy   - Fight as Pain
yeoldegame     - Pong mini-game
bloobabblooba   - Underwater mode
eternalcoins   - Unlimited lives (1P mode)