Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock
A Stroll In The Demonic Park (30 points)	Complete the game on any difficulty setting.
A True Horseman (60 points)	Complete the game on APOCALYPTIC.
Abracadabra (30 points)	Open all Death Tombs.
BFA (10 points)	Unlock Everything.
Bravo Old Chap (20 points)	Defeat Wicked K.
Feeding Time (20 points)	Level Up Your 1st Possessed Weapon.
Four My Brother (60 points)	Complete the game on NORMAL.
Full Potential (30 points)	Unlock All Combat Moves & Upgrades.
Grim Reaping (30 points)	Unlock Reaper Form.
Is There Anyone Else? (30 points)	Complete The Crucible.
It's Definitive (70 points)	Complete the game on DEATHINITIVE.
Respec Yourself (20 points)	Your First Respec.
The Secondary Adventure (50 points)	Complete all Secondary Quests.