All Weapons:
Pause the game and press R1+Square, Triangle, Circle, X.

Submission:
Yohannes Aditya (yohannes@netexecutive.com)

Big Head Mode:
Pause the game and press L1+L2+R2+Down.

Submission:
Yohannes Aditya (yohannes@netexecutive.com)

Hidden Boss
To fight a hidden boss, enter the password: Circle, Square, Square, X, Circle,
X, X, Circle.

Submission:
Yohannes Aditya (yohannes@netexecutive.com)

Increase Clean Points:
Pause the game and press L1+L2+Circle+Square.

Submission:
Yohannes Aditya (yohannes@netexecutive.com)

Invincibility:
Pause the game and press Circle, Square, Left, Right+R1+R2.

Submission:
Yohannes Aditya (yohannes@netexecutive.com)

Special Mode:
Pause the game and press R1+R2+Triangle+Circle.

Submission:
Yohannes Aditya (yohannes@netexecutive.com)