I was in GAME last night looking for this for my xbox to mod it and when i got to the till it was 99p rather than the £3.99 price on the cover.
I figured this would be useful to anyone who got a £49.99 xbox and want to mod it because this is one of the games you can use. It is also a very good game thats cheap.
See here: http://www.hotukdeals.com/forums/showthread.php?t=34563
for more information on the mod stuff.
Please note, it was IN STORE and it wasn't marked on the box so ask a member of staff!