Why does everyone keep saying the Gears 1tb bundle would be Xbox's highest seller? The 1tb bundles don't usually do all that well, and there's a more current Battlefield One 1tb bundle: a game that is going to sell a hell of a lot more than Gears on Xbox, exclusive or not. It's the Halo 500 gb bundle that's really making the comparison difficult, as that will likely be the one's bestselling bundle this month.