All Weapons:
At the Cheats Screen press R2, X, L1, Square, R1, Circle, L2
Alternate shower girl cutscene:
On the ''space bay'' level, when you reach the area with the naked girls taking a shower, do not rescue them with the stealth generator yet. Instead, pass them up and rescue the babes in the prison cells. Now go back and rescue all of the babes in the shower using the stealth generator.Now,instead of seeing the regular cutscene, you should now see the *sexier* alternate 'shower girl' cutscene.
Big Head Mode:
At the Cheats Screen press Square, Square, X, Circle, Circle, X, Square.
Double Damage Mode:
At the Cheat Screen enter the following code...
Square - Square - Square - Circle - Circle - Circle - X
Then in your game every hit you do should do twice the damage of what it normally does.
First Person Mode:
At the Cheats Screen enter the following code...
L2 - R1 - L1 - R2 - Circle - X - Square
Then in your game you should be seeing everything in first person.
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.
Invincibility:
At the Cheats Screen press L1, Square, Circle, Circle, Square, L1, L2.
Level Select:
At the Cheats Screen press Press Circle, X, Square, Square, X, Square, Circle.
Master Code:
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. This will enter all of the codes.
Out-Takes Movie:
At the Cheats Screen enter the following code...
L1 - L2 - R1 - R2 - Square - Square - Circle - Circle
Then you should be able to view an out-takes movie.
Small Head Enemy Mode:
At the Cheats Screen enter the following code...
X - L1 - X - R1 - X - X
Then in your game all of the enemies should have small heads.
Unlimited Ammo:
At the Cheats Screen enter the following code...
L2 - Circle - R2 - Square - Circle - L2 - R1
Then when you get to your game Duke should have an unlimited amount of ammo.
Submitted By Team PowerGamerz