Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock	Points
Baptism of Fire	Complete your first mission.	50
Defective Turret	Die before you directly harm any enemies with your weapons.	100
Defender of Humanity	Complete the first 4 levels.	50
Dizzy Bonus III	Turn around 450 times.	200
Dizzy Bonus II	Turn around 400 times.	200
Dizzy Bonus IV	Turn around 500 times.	200
Dizzy Bonus I	Turn around 350 times.	200
Dizzy Bonus V	Turn around 550 times.	200
Dizzy Work III	Turn around 300 times.	100
Dizzy Work II	Turn around 200 times.	50
Dizzy Work I	Turn around 100 times.	50
Enemy of Ghosts	Materialize 150 ethereal beings with [Silver Shackles].	100
Level bonus III	Complete the first 5 levels.	200
Level bonus II	Complete the first 3 levels.	200
Level bonus IV	Complete the first 6 levels.	200
Level bonus I	Complete the first 2 levels.	200
Level bonus V	Complete the first 7 levels.	200
Retaliation	Destroy 75 enemies with a defense mechanism that activates upon taking damage.	100
Seismologist	Lure 3 enemies out of hiding with one [Earthquake].	100
So Close!	Lose when the timer shows less than 5 seconds.	100
Unbending Will	Complete a level with only 1 health left.	100
Woodpecker's Stunt	Complete a level after shooting the wall at least 30 times.	100