Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock	Points
All Out War	Defended your compatriots as they repaired the subway train.	40
Always Recycle	Repaired a weapon.	40
An Evil Resides	Escaped via the subway train.	40
Backtracking	Got sent to run some errands. Time for backtracking!	40
Boulder Dash	Reached the underground caverns.	40
Cash On Delivery	Delivered all parts to repair the subway train.	40
Chop Til You Drop	Reached the supermarket.	40
Classic Safe Room	Took refuge underground and reunited with a friend.	40
Clock Terror	Completed Story Mode in 2 hours 30 minutes or less.	40
Dine And Ash	Located a friend and became besieged by the undead.	40
Direct Feed	Built a plan to infiltrate the underground.	40
Employee Parking	Reached the parking garage.	40
Escape Vector	Reached the final subway platform.	40
Experience The Nightlife	Reached the city streets overflowing with the undead.	40
Getting Steamy	Ran into a dear friend, and a deadly situation.	40
Help Me	Rescued a survivor in Operation: Rabid Wolf.	40
Silent Hell	Completed the story.	40
That Old Familiar Feeling	Met a fellow survivor and started your journey.	40
The Gun Survivor	Survived Operation: Rabid Wolf.	40
The Mercenaries	Unlocked Operation: Rabid Wolf.	40
Time For Payback	Secured a powerful weapon to battle the undead.	40
Use The Facilities	Reached a not so safe, safe room.	40
Weaponsmith	Upgraded a weapon.	40
Welcome Back	Returned to your opening hour.	40
You Died	You died.	40