A visit to the Zavvi store at Glasgow fort today brought up this little gem.
As stated the £15 price has only only been seen INSTORE and only verified at one store so far.
I resisted the temptation so please don't ask for a reciept as proof
description can be found at http://en.wikipedia.org/wiki/BioShock
Further research finds the Steel Tin version for PC at only £12.99 with free dellivery !!