The Xbox 360 beta for Call of Duty: World at War is now open to everyone. Previously, the beta was closed to most that weren't signed up at the Call of Duty site before a certain date.
1. Go to Xbox Live MarketplaceMore information can be found at the Call of Duty website.
2. Find Call of Duty: World at War in either the "New Releases," "Games," or "Demos" section of Xbox Live Marketplace
3. Click on CoD: World at War and you will see the Multiplayer Beta available
4. Download the Beta and prepare yourself for the addictive multiplayer action Call of Duty is known for!