Please note that the extra content free Gears of War 3 called "Booster Versus Map Pack" is now available on the marketplace and go to add the following maps: Azura (Challenge only), Rust (Challenge only), Wake of Blood (Challenge only), and Marsh Tower. The download, which is mandatory if you want to continue playing on multiplayer, and queue from the web at the following address and will occupy about 237MB on your storage devices.