From the Cheat Sheet Master Database at www.g4techtv.com.

Cheat Page: http://www.g4techtv.com/html/cheat.asp?view=list&gametitle_key=3355


When at the Main Menu higlight the Extra Content option and press the R1 trigger button. A keypad will appear on screen. Enter in the following codes, you'll get a confirmation at the bottom of the screen when codes are entered in correctly.

Unlimited Ammo 978945
No Head 987978 Super PSI 456456
All Powers From Start 537893
Bulletproof 548975
EXTRA MISSIONS:
TK Alley 090702
Psi Pool 565485
Bouncy Bouncy 568789
Aura Pool 659785
Panic Room 76635766
Up And Over 020615
Pitfall 05120926
Gnomotron 456878
Gasoline 9442662
Gear Gauntlet 154684
Bottomless Pit 154897
Tip The Idol 428584
Stop Lights 945678