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The Gears of War 3 beta is now available to all Xbox Live Gold members, which includes three new multiplayer game modes and four maps. 

Two of the maps are Stadium and Supermarket, and the other two have to be voted on at the Facebook page. The maps being voted on are Mercy, Old Town, Overpass and Trenches. 

The Gears of War 3 beta had previously only been available to gamers who bought Bulletstorm.