Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock
Bull's Eye! (10 points)	Kill five ghosts with one harpoon.
Dead Eye (50 points)	Finish five rounds without missing a shot.
Demolition Man (50 points)	Kill ten ghosts with one explosion.
Exorcist (100 points)	Complete Arcade mode.
Extreme Exorcist (200 points)	Defeat the final boss without losing a life!
Full Arsenal (50 points)	Unlock all weapons.
Ghostblaster (200 points)	Kill 1000 ghosts!
Grand Tour (50 points)	Unlock all rooms.
It's a Party! (30 points)	Manage to amass thirty ghosts on-screen!
Necromancer (100 points)	Die 1000 times!
Take that, Physics! (10 points)	Jump on five bullets in one round.
This House is Clean! (50 points)	Exorcise ten ghosts at once.
Unchallenged (100 points)	Complete all challenges.