99 Heavy Ammo:
Pause the game, then hold L and press A, B, X, Y, B, A. If you entered
the code correctly, you will hear a tone.


All Rooms Available:
Pause the game, then hold L and press A, Y, X, B, Y, X. If you entered
the code correctly, you will hear a tone.


Extra multi-player levels:
Play through each stage on 1 player mode in each level (ex. beat all
stages on the 1st level) to acess a new multi-player stage.


Fix Toy:
Pause the game, then hold L and press A, X, B$ Y, A$ Y. If you entered
the code correctly, you will hear a tone.


Health recharge:
If you turn on the sink, go down to the drain and let the water fall
of you, your health will recharge. NOTE: this has only been tested in
the Demo


Upgrade Machine Guns:
Pause the game, then hold L and press B, A, Y, X, A$ B. If you entered
the code correctly, you will hear a tone.


Upgrade Weapons:
Pause the game, then hold L and press X, A, Y, B, A, X. If you entered
the code correctly, you will hear a tone.

Patrick Hofmann <ph@dlh.net>