Activison sends along details on preorder incentives for Call of Duty: Black Ops 2, saying those who preorder the military shooter sequel from Amazon will receive a digital wallpaper, those who go through GameStop will receive a two-sided poster, and preorders through Best Buy will receive a set of free dog tags. Also, this E3 trailer offers a behind-the-Scenes look at the game. Word is: "Treyarch head Mark Lamia and the Call of Duty: Black Ops 2 development team discuss their motivations heading into this exciting entry in the Call of Duty franchise. Learn about weapons & technology, the campaign, graphics, multi-player and the return of Black Ops zombies."