Boss mode
Enter D0NTN33DM0N3Y as a password. Alternately, kill 100 Bosses.
Final Challenge
Enter KJQV9LWB8!9HG to begin at the end of the game.
Sound test option
Kill 1,000 zombies.
Movie test option
Kill 2,000 zombies.
View ending option
Defeat all Bosses in challenge mode.