Psychonauts cheats and cheat codes for XBox

Cheats:
While playing the game press the following button combinations bellow on 
your controller. If you typed correctly, the voice will say: "You cheated"

All Psi powers:
Hold L + R and push B, B, Y, White, click Left thumb-stick, push Y 

Maximum rank and all Psi powers:
Hold L + R and click Left thumb-stick, Right thumb-stick, Left thumb-stick, 
White, B, White

Maximum lives:
Hold L + R and click Left thumb-stick, push White, White, B, A, click Right 
thumb-stick

Maximum ammunition:
Hold L + R and click Right thumb-stick, push A, click Left thumb-stick(2), 
push Y, B

Invincibility:
Hold L + R and push B, White, B, B, Y, Black 

Full Arrowheads:
Hold L + R and push A, click Right thumb-stick(2), push White, Y, X

All items available:
Hold L + R and click Right thumb-stick, push B, White, White, click Left 
thumb-stick, push Y during game play. Note: This does not unlock the 
Psi-ball Colorizer or Dream Fluffs. 

Weird text:
Hold L + R and push White, A, click Left thumb-stick, and push White(2), B


Unlock Raz's psychic powers:
Clairvoyance: Go open the fridge in Boid's mind. 
Confusion: You can find it in Bullfighters home in Edgar's mind. 
Invisibility: Go and see Ford after you reach a higher rank. 
Levitation: Finish Milla's dance party 
Marksmanship: Destruct the Mega Censor in Sasha's mind, 
Pyrokinesis: Check Ford after you reach a higher rank. 
Shield: Relese the lungfish from prison 
Telekinesis: Go and see Ford once you have reach a higher rank.

Unlock bonus movie
Get the Psi Cadet rank 100 by accumulate all Psi-Orbs, Psi-Cards, 
Cobwebs, Figments, Emotional Baggage, and scavenger hunt items