Saw this while browsing through HeaD in Leeds.
Call of Duty 4: GOTY Edition XBOX 360 - £19.99
Didn't see any PS3 ones.
They had some pretty good other deals.
Note, no more 25% off list price.
Some Blu-rays at tempting prices.
Also spotted Final Fantasy Tactics on PSP for £7.74
Edit - Oh and Left 4 Dead on PC for £14.74