God mode:
Press Start to pause game play, then hold L + R and press A(2), B, A(5). A sound will confirm correct code entry.

All weapons, keys, ammo, and health:
Press Start to pause game play, then hold L + R and press A, B(2), A(5). A shout will confirm correct code entry. All weapons and keys will be unlocked, and your health and ammunition will be restored.

Level skip:
Press Start to pause game play, then hold L + R and press A, B, A(2), B(3), A. The sound of a door opening will confirm correct code entry. When the game is resumed, you will start on the next level. Note: If this code is enabled on level 1, you will go to the secret floor.

Advance to Boss level:
Press Start to pause game play, then hold L + R and press A, B, A(2), B(2), A(2). The sound of a siren will confirm correct code entry. When the game is resumed, you will start at the current Boss.