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Level Select

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

Invincibility

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

All Weapons

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

Infinite Ammo

At the Cheats screen, press L2, Circle, R2, Square, Circle, L2, R1.

Double Damage

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

Temporary Invincibility

At the Cheats screen, press L1, L1, L1, L1, L1, L1, R2.

Invisibility

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

Full Ego

At the Cheats screen, press R1, R1, Circle, Circle, L1, L1, R2.

Full Armor

At the Cheats screen, press L1, L1, R1, R1, X, X, Circle, Circle.

First Person View

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

Big Head Duke

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

Small Head Duke

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

Wacky FMV Sequences

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

Outtake FMV Sequences

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

Ending FMV Sequence

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

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.