Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
Only A Prime ( 25 points )	Defeat the Fallen as Optimus.
The Living Dead ( 15 points )	Viral - Kill someone with Viral Achievement, then taunt them in a Ranked or Player Match game.
Traitor ( 25 points )	Defeat the Fallen as Megatron - Decepticon Campaign.