Spotted this online, cheapest I've seen. Not sure if its in store though.

The sequel to the title that GAME Customers voted the best game of the last two years, Modern Warfare 2 is an pulse-pounding First-Person Shooter that fully deserves its mantle as the most eagerly awaited game of 2009!
Delivering an epic campaign, Modern Warfare 2 on Xbox 360 will see players once again wielding the latest firepower in both singleplayer and multiplayer modes set in the mayhem of Modern Warfare.
The graphics are stunning and the attention to detail is awesome. Climbing up a sheer ice cliff, high above an icy ravine, tiny cracks will appear with every second youre hanging from your ice pick You can almost feel the danger in your living room!

£27.98

www.game.co.uk