Crackdown 2

The sequel to the award-winning vertical-world adventure, Crackdown 2 is the ultimate open-ended world action experience. The game lets you be judge, jury, and executioner for a huge, fully explorable city. Crackdown 2 takes multiplayer gaming to new levels for the ultimate co-op and competitive multiplayer experience, providing you and your friends with the complete freedom to explore, destroy, and play your way as you restore justice and peace to Pacific City—by any means necessary. [Microsoft]