Metal Gear Solid 4
Battlefield: Bad Company
these are both currently under the 2 for £45 offer at Argos,..
but when you add these 2 selected games to your basket, it shows as £25.
... then simply reserve for instore pickup.
** UPDATE **
make sure you print out your reservation, as the cashier needed to update the price on the till when i showed her my reservation slip... if not, tell them to go and double check on their website.
** UPDATE 2 **
you can not use the quick pay machines, due to age restrictions on the games.