Unlock All Cheats
At the Cheats screen, press L1, L2, R2, R1, L1, L2, R2, R1, L1, L2, R2, R1, L1, L2, R2, R1, Circle, Circle, Circle, Circle, X, X, X, X, Square, Square, Square, Square, Select, Select, Select, Select.

All weapons
At the Cheats screen, press R2, X, L1, Square, R1, Circle, L2.

Big Head Duke
At the Cheats screen, press Square, Square, X, Circle, Circle, X, Square.

Big Head Enemies
At the Cheats screen, press X, X, R1, X, L1, X

Small Head Enemies
At the Cheats screen, press X, L1, X, R1, X, X.

Double Damage
At the Cheats screen, press Square, Square, Square, Circle, Circle, Circle, X

First Person View
At the Cheats screen, press L2, R1, L1, R2, Circle, X, Square

Full Armor
At the Cheats screen, press L1, L1, R1, R1, X, X, CIRCLE, CIRCLE.

Full Ego
At the Cheats screen, press R1, R1, Circle, Circle, L1, L1, R2

Infinite Ammo
At the Cheats screen, press L2, Circle, R2, Square, Circle, L2, R1

Invincibility
At the Cheats screen, press L1, Square, Circle, Circle, Square, L1, L2

Invisibility
At the Cheats screen, press Square, X, Circle, Square, X, Circle, Square

Level Select
At the cheats screen, press X, Square, Square, X, Square, Circle

Temporary Invincibility
At the cheats screen press L1, L1, L1, L1, L1, L1, R2.

Outtake FMV Sequences
At the Cheats screen, press L1, L2, R1, R2, Square, Square, Circle, Circle.

Wacky FMV Sequences
At the Cheats screen, press L1, L2, R1, R2, Circle, Circle, Square, Square

Ending FMV Sequence
At the Cheats screen, press Circle, R2, L1, Square, L2, X, R2

Cheats