Infinite Ammo:
Up, Up, Down, Down, Left, Right, Left, Right, R Trigger
Unlock Battle mode:
To unlock the Extra Battle mode, you must beat the game on both Arrange and Original modes. Also once you do this, a short cinema will show with a zombie of Brad. If you do not collect any items in the very beginning, when you go down the stairs in front of the Police Station, Brad`s zombie is there. Kill him and he drops a key to the lockers in the Darkroom.
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