Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
Mother Brain Slayer ( 50 points )	Defeat Mother Brain
De Rol Le Slayer ( 40 points )	Defeat De Rol Le
Slterazgohg Slayer ( 40 points )	Defeat Slterazgohg
Dark Falz Slayer ( 60 points )	Defeat the Boss in the Maximum Attack G event (M.A.G.)