Called PC World Bury and while they would give me one for free, they said it would only be with a purchase - even something as cheap as a pen would do, but it'd need to be one purchase per game.
That would be fine if anything was free though - nothing can be free on the stock system so they would actually charge me full price (1p!) for it :P
For anyone wanting to know.
Full name "INTEL FREE GAME WITH LAPTOP/PC"
SKU Code "923228" (although she said this didn't exist although I checked it myself at work and it did).
Will try to nab a few from work for free when talking to the manager but it seems I can't get 100 million copies now