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This is the actually Gameplay Trailer of Battlefield 3 from Gamescom.
This an map called Caspian Border on Conquer Game Mode.
Battlefield 3 is a first-person shooter action video game, being developed by EA Digital Illusions CE and to be published by Electronic Arts. The game is set to be released on October 25, 2011 on Microsoft Windows, PlayStation 3, Xbox 360 and EA mobile confirmed a port for iOS platform.