Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock	Points
Accurate Blast	Blow up an enemy with a grenade.	20
Alien Harvest	Watch a farmer defeat an alien, proving that the fields are fighting back.	40
Barbarians' Fall	Defeat the Rustland Raiders.	70
Bath Time	Complete the sewer stage.	40
Broken Wing	Defeat Titanium Wing.	50
Brute Force	Equip a Shotgun.	20
Bullet Storm	Equip a Machine Gun.	20
Buried Secrets	Complete the area 41 stage.	40
Burning It All	Equip a flamethrower.	20
Clearing the Way	Open a gate with a keycard.	30
Did You Wear Sunscreen?	Complete the desert stage.	40
Explosive Power	Equip a bazooka.	20
Intergalactic Journey	Get abducted by an alien ship.	50
Intergalactic Mission	Complete the mothership stage.	60
Is This the Right Floor?	Complete the elevator stage.	40
Lethal Energy	Equip a plasma weapon.	20
Lethal with Plasma	Kill more than one enemy with the same plasma bullet.	20
Life on the Farm	Complete the farm stage.	50
Lord of the Universe	Defeat Cosmic Lord.	100
Maximum Power	Equip a mini gun.	50
Mental Collapse	Defeat Matrix Mind.	60
Not in Glasses!	Cowardly attack an unarmed enemy.	20
On the Road	Complete the road stage.	40
Star Raider	Defeat the Nebula Raider.	80