just popped into my local asda and they had some cracking bargins on games without covers- came with instruction manual and disk.
Some I noticed were
Borderlans (360) - £12.50
Bayonetta (360/PS3) - £7.50
FIFA 10 (WII) - £7.00
were more but couldnt remember them all
DONT KNOW IF IT'S NATIONWIDE - SORRY