All Keys, All Weapons, and Full Ammo: hold down LEFT TRIGGER and press A,B,A,B
* Berserk Mode: hold LEFT TRIGGER and press X,X,X,Y.
* End Level: hold down LEFT TRIGGER and press A,A,B,B.
* Chainsaw: hold down LEFT TRIGGER and press B,B,A,A.
* Weapons and Ammo: hold down LEFT TRIGGER and press B,B,B,B.
* GOD Mode: hold down LEFT TRIGGER and press A,A,A,A.
* Invisibility: hold down LEFT TRIGGER and press X,X,Y,Y.
* Light Amplification Goggles: hold down LEFT TRIGGER and press Y,Y,Y,X.
* Radiation Suit: hold down LEFT TRIGGER and press X,Y,Y,Y.
* Show All Map: hold down LEFT TRIGGER and press Y,Y,Y,Y.
* Temporary Invincibility: hold down LEFT TRIGGER and press X,X,X,X.