SoftUK are selling "Psychonauts" for the PC for £4.49.
Use the code "Cheap Games" (without quotes) to get free delivery.
You can get cashback via some sites (e.g. 2% Free Fivers, making it £4.40). You can also get 6% cashback through SoftUK's 'Collector' program.
£9.93 is the next best price, from Games Buyer.
PLEASE NOTE: SoftUK has recently had periods of time when the site has been down, so if you can't get it to load, try again later. :-)
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 characters unusual talents to manipulate the strange worlds created by the subjects mind.
Raz literally walks through an individuals 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.