Instructions:With everyone else posting game.co.uk codes, I felt like joining in...
Offer codes (pick either one, if you are tired of posing as a student):
How to redeem your Offer Code
Simply enter the offer code in the "Offer Code" Box on the Basket page of the Checkout. Click 'Add' and the page will refresh to show you the new discounted total. You can only use each Offer Code once.
It should also work just fine for pre-orders ;)