Available only for Windows 8 and Windows Phone 8, Halo: Spartan Assault is a new top-down action shooter that brings a “Halo” video game to touch-based devices for the first time in franchise history.

Halo: Spartan Assault will start rolling out on consoles later this month, Microsoft has announced. Plus, if you already own the Windows 8 or Windows Phone 8 version, you'll get a discount on the ...