Unlock Hard Mode:
Beat the game once to unlock Hard Mode. When you start the game over on the same file a brass heart is added to the save file.
Unlock Ruby Key:
Beat the game once and you automatically recieve the Ruby key on your second playthrough which is the 'Special Key' you need to unlock the door at the right of the loby that leads to a room with an arcade game called 'Thou Art Dead' which you can play.
Unlock Doom Bringer 3000 (DJ's best Water Gun):
Beat the game once and on your second playthrough on the same file and play the 'Thou Art Dead' arcade game and unlock the Doom Bringer 3000 by beating Skull's high score of 50'000 to open a passage to a chest with it inside.
Added by: Sanzano Aug 9th 2006, ID#8922