Psychonauts is a 3D platform game starring a gifted young psychic named Raz as he attends school to become a member of a top-secret intelligence organization. As part of his academic "studies," Raz must enter classmates' minds to solve their problems, ranging from childhood trauma to borderline personality disorders. Accomplishing these feats involves using the character's unusual talents to manipulate the strange worlds created by the subject's mind.

Raz literally walks through an individual's fears, delusions, and rage to solve various object-oriented puzzles and to eliminate potential threats. The human brain guards itself against foreigners poking around the subconscious and will manufacture enemies and barriers to stop Raz before he can resolve whatever psychological ailment is plaguing the host. Among the special powers Raz can call upon are invisibility, confusion, mind control, psychic blasts, and telekinesis. ~ Scott Alan Marriott, All Game Guide