Project Gotham Racing 4 ’s ‘Premium Challenge Pack’ is the latest Xbox Live Deal of the Week. Fire up that jumbo jet hidden inside your Xbox 360 (mine’s getting louder, should I be worried?) and you’ll find the downloadable content available for 240 Microsoft Points, a 40% reduction from its original price. The pack itself includes 10 new vehicles (7 new cars and 3 bikes - full details of which you can find here) and a new World Arcade Challenge Mode that adds 20 ‘arcade events.’ As is the usual way, this offer is only available to Xbox Live Gold members.