Not a bad deal from Amazon and you can select Dead Space 2 as the additional game for £20. CEX will give £30 for it making it £289 if you didnt want the game.
Step 1: Select the Xbox 360 250GB console shown below by ticking the box to the left of the console.
Step 2: You can now add the Kinect Sensor with Kinect Adventures to your basket. The combined purchase price of £299 for both the Xbox 360 250GB console and Kinect Sensor will be made at checkout.
Step 3: Then add any of the selected games or Xbox LIVE Gold Membership (12 months) below for £20. The price of the selected game or membership will be reduced at checkout.