Not to be confused with the other launch trailer for Halo 4 (which was called "Scanned") - this launch trailer for Halo 4 shows actual gameplay footage and gives you a brief glimpse at the story for the Xbox 360 exclusive. The game is out on November 6th and drops players back in the role of Master Chief with Cortana by his side as he lands on the mysterious planet of Requiem to meet the ancient beings known as the Forerunners.
Halo 4 will features four player co-op gameplay throughout the campaign with support for two player local co-op as well as four player online co-op in the Spartan-Ops mode.
Source: Youtube.com