Monolith and Warner Bros. have opened registration for their new multiplayer FPS 4 on 4, Gotham City Impostors, which puts us in the shoes of some "imposters" dressed up as heroes or villains of the universe of Batman. To join the beta you will not have to do is fill out the request form on the official website of the game and wait for the month of September when it will be available on the marketplace. Please note that the game scheduled for release next winter as the Live Arcade for 1200 Microsoft Points.