Vanguard Games and 343 Industries made an announcement today that is great for those of us who have terrible patience. Halo: Spartan Assault, Microsoft's new top-down arcade shooter for Windows 8 mobile devices, will be launching today at 4 pm Pacific.

The game centers around Halo 4’s Sarah Palmer and the origins of the Spartan Ops program. The story itself slides in between the events of Halo 3 and Halo 4. Players who blow through all 25 missions will be able to gain experience points and unlockable Spartan emblems for their Halo 4 game.

Read our preview of the game for more details. If you have a Windows 8 device, you can go download the game today for only $6.99.