Psychonauts Cheats

All Psi powers
Hold [L] + [R] and quickly press [B]x2, [Y], [White], click [Left Analog-stick], press [Y] during game play. The phrase "You cheated" will be spoken to confirm correct code entry.

Maximum rank and all Psi powers
Hold [L] + [R] and quickly click [Left Analog-stick], [Right Analog-stick], [Left Analog-stick], press [White], [B], [White] during game play. The phrase "You cheated" will be spoken to confirm correct code entry.

Full lives
Hold [L] + [R] and quickly click [Left Analog-stick], press [White]x2, [B], [A], click [Right Analog-stick] during game play. The phrase "You cheated" will be spoken to confirm correct code entry.

Defeating the Lungfish
To defeat the Lungfish for the first and second stages, whenever he blows out the yellow boxes hit the one that he starts to suck in. To win in the final stage, stand by a clam. When he starts swinging the thing on his head, punch the clam shell, then punch him.

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 have ranked up enough
Levitation - Complete Milla's dance party
Marksmanship - Destroy the Mega Censor in Sasha's mind
Pyrokinesis - See Ford after you have ranked up enough
Shield - Release the lungfish from prison over in lungfishopolis
Telekinesis - Go and see Ford once you have ranked up enough