Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock
Bomba Punter (30 points)	Punt 20 Bombas.
ChAIRness (50 points)	Complete the game at 100% in under 3 hours on Insane.
Completionist (50 points)	Complete the game with 100% of the items.
Hero (100 points)	Complete the game on any difficulty setting.
Jason Bailey (50 points)	Complete the game at 100% in under 2 hours on any difficulty.
Let's Get Punchy (20 points)	Melee 5 soldiers.
Look Out! (10 points)	Kill a soldier with a Bomba.
Make 'Em Scream (30 points)	Get 100 soldiers to scream.
Minimalist (30 points)	Complete the game with less than 13% of items.
My Head A-splode (30 points)	Get 50 headshots.
Proven Grounds (20 points)	Complete the three challenge packs in the Proving Grounds.
Reunited (10 points)	Rescue Claire.
Serious Complex (30 points)	Level up to experience level 50.
Status Update: Single (30 points)	Complete the game by abandoning Claire to her fate.
The Insurgent (50 points)	Complete the game at 4% with only the Flashlight, Backpack, Grenade, Foam, and Missile.
To Kill a Blackbird (20 points)	Destroy the helicopter attacking the vice president.
Walkin' on Water (10 points)	Make it from one end of the lake to the other in hyperspeed.