Invincibility
Pause game play and press [Circle], [Square],
[Left], [Right] + [R1] + [R2].
All weapons
Pause game play and press [R1] + [Square],
[Triangle], [Circle], [X].
Big head mode
Pause game play and press [L1] + [L2] + [R2]
+ [Down].
More clean points
Pause game play and press [L1] + [L2] + [Circle]
+ [Square].
Special mode
Pause game play and press [R1] + [R2] + [Triangle]
+ [Circle].
Fight secret Boss
Enter [Circle], [Square], [Square],
[X], [Circle], [X], [X], [Circle] as
a password.