Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
Annihilation: Mahastra Tara (75 GP)	Defeated Mahastra Tara in Hard Mode.
Decadent Devil (50 GP)	Defeated Astra Sarama at Sattva, City of Decadence.
Empress of Angels (50 GP)	Defeated Mahastra Tara at Vimukti, Fortress of Angels.
Subjugation: Astra Sarama (50 GP)	Defeated Astra Sarama in Hard Mode.