What’s this? A new Halo game? Yes! And what’s this? Exclusive to Windows 8 and Windows Phone 8? Yes! We’re starting to see what we’ve been expecting for some time – Microsoft titles being released as exclusives to the Microsoft platform. This, Smart Glass, and the sheer buttery beauty of Windows Phone should help compel more adoption.
ING: The story marks the return of Sarah Palmer, the UNSC Commander and veteran of the First and Second Battle of Requiem. The whole context of the game borrows from the Spartan Ops model, which has players running through missions in a tactical simulator, complete with daily challenges. In a sense, the tablet and phone version of the game serves as the simulator through which the player is meant to relive the storied battles from the Halo lore. As the player completes challenges, he or she will unlock new content for Halo 4 and Waypoint.
Official site here