Halo: Spartan Assault is a new top-down action shooter coming to Windows 8 PCs and tablets and Windows Phone 8 devices. Currently scheduled for release in July 2013, this touch-based Halo game takes place between the events of Halo 3 and Halo 4 and offers 19 new achievements worth a total of 190 points. If you’d like the lowdown on the relevant unlockables that will soon be added to your Gamerscore, take a look at the specifics below!

 Overrun – Complete Operation A – 10 Points

 Switched On – Complete Operation B – 10 Points

 Switched Off – Complete Operation C – 10 Points

 Evacuated – Complete Operation D – 10 Points

 Terminated – Complete Operation E – 10 Points

 Escort Service – Keep all Wolverines intact in Operation A, Mission 3 – 5 Points

 Nowhere to Hide – Prevent all Jackals from regenerating their shield in Operation B, Mission 3 – 10 Points

 Never Knew What Hit Them – Kill a convoy target with every stationary gun in Operation C, Mission 3 – 10 Points

 Brute Force – Finish the objectives using only the Brute Shot, melee and grenades in Operation D, Mission 1 – 10 Points

 Foot Soldier – Finish the objective without using any vehicles/turrets in Operation E, Mission 4 – 10 Points

 Recruit – Earn a star of any type in an operation mission – 5 Points

 Prodigy – Earn your first Gold star in an operation mission – 5 Points

 117 – Earn all Gold stars in all operation missions – 20 Points

 Distinguished Service – Earn all medals in the game at least once – 15 Points

 Weapon of Choice – Score a kill with every handheld weapon (excluding Rocket Launcher and Spartan Laser) – 5 Points

 Powered by MJOLNIR – Use every ability at least once (excluding Overshield and Seeker Drone) – 10 Points

 Skull Combo – Complete any mission with the maximum number of Skulls active – 10 Points

 Vidmaster Challenge – Complete Operation 5, Mission 1 with the Hollow and Black Eye Skulls active – 15 Points

 Extra Credit – Complete 75 challenges – 10 Points

Text from Halowaypoint.com