Execute a backflip; during it, press R, B, C, and Right
While playing press C + X to enter 3D map mode; rotate the map and then press P, then LS + A + B + C as the map returns to normal.
Contributed By: !.ACA.!.
Execute a backflip; during the time, press R, Down, and B
When you use the Frying pan as your current weapon, press c twice to display the weapon select option. Highlight the drill, and press A + RS. If you put it in correctly will the words ''kneel before me!'' appear.
Contributed By: Xeon.
At the main menu, press L, R, and up at the same time, then press A for a new game. At the difficulty menu, press L, R, and Down at the same time. Select the difficulty. At the ''Letter to Mom'', press B.
In the human turbo mode, tilt the view slightly below the maximum downward angle and press R, A, and B
In the human turbo mode, tilt the view slightly below the maximum angle, and press L, A, and B
In the jetpack mode, bring up the weapon select menu and press L and Down/Right
Highlight a game from the load game menu. Press LS + RS + B to start the game. Levels with the Butthead monster will be modified by the code.
Contributed By: Sappy.
At the Delete Game menu, press A and Right, then press B and Up. Return to the main menu and witness the ending. This only works if you have at least one saved game.
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