Complete the following achievements to unlock Microsoft Gamerscore points.

Achievements	How to unlock	Points
A friend in need	Revive 25 fallen Troopers.	20
Capable in the field	Reach Level 15 in any Trooper Class.	50
Carry on, Private	Re-enlist three times.	100
Citizens of the Federation R.I.P.	Salute six fallen Troopers.	20
Come on, you apes!	Achieve Victory on Easy difficulty.	20
Don't look up!	Kill 30 Grenadier Bugs.	20
Egg Smasher	Destroy 500 Hive Eggs.	50
Everybody should have a friend like me!	Revive 100 fallen Troopers.	50
Everyone fights! No one quits!	Achieve Victory on Normal difficulty.	50
Gimme the nuke	Detonate a Hive Core.	20
I'm doing my part!	Achieve Career Rank 100.	100
If you want to make an omelet	Destroy 1000 Hive Eggs.	15
In Memoriam: Buenos Aires	Kill 2297 Warrior Bugs.	50
It's an ugly planet, a Bug planet...	Complete 20 matches of Horde Mode on Valaka.	20
Kill 'em all!	Kill 5000 Bugs.	50
La Bomba	Kill 100 Bombardier Bugs.	20
Master at Arms	Reach Mastery Level 10 on any weapon.	50
Nuke 'em, Rico!	Detonate a total of 10 Hive Cores.	50
Path to Citizenship	Finish the Tutorial.	15
Ring of Fire	Kill 888 Fire Warrior Bugs.	20
Royale with Cheese	Kill fifty Royal Guard Bugs.	50
The only good Bug is a dead Bug!	Kill 2000 Drone Bugs.	20
Who needs a knife in a nuke fight anyway?	Get 20 melee kills.	20
You got a Bug problem?	Get 200 kills with any grenade type.	20
You wanna live forever?	Achieve Victory on Hard difficulty.	100