Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock	Points
A Walk in the Park	Cleared a Campaign scenario on Normal Difficulty or Higher.	100
Aim for the Head!	Defeated a Zombie.	50
Brutal Biohazard	Cleared a Campaign scenario on Biohazard Difficulty or Higher.	100
Easy Peasy	Cleared a Campaign Scenario on Easy Difficulty or Higher.	50
Enforcing the Apocalypse	Defeated an Enforcer.	150
Overwhelming Infection	You died.	50
Take Down the Horde	Cleared Onslaught Mode on any scenario and difficulty.	100
The Nightmare Rages	Cleared a Campaign scenario on Nightmare Difficulty.	150
They're Hunting You...	Defeated a Reptile.	100
Too Strong For You	Defeated a Brute.	150