Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
Ace ( 15 points )	Complete the Abyss Canyon mission with 1 million points.
Adept ( 10 points )	Complete any survivor mission.
Blood Bath ( 25 points )	Rack up a killing spree bonus of 33x.
Bulletproof ( 25 points )	Complete a wave in a survivor mission without taking damage.
Epic Hero ( 50 points )	Complete the Battle of Ghen Crag mission with 4.4 million points.
Freedom Fighter ( 10 points )	Complete a wave in any Survivor Mission.
Hero ( 15 points )	Complete the Battle of Ghen Crag mission with 980,000 points.
Speedster ( 25 points )	Complete any survivor mission in under 35 minutes.
Spirit of Tesla ( 25 points )	Upgrade a weapon to stage 3 in a survivor mission.
Top Ace ( 50 points )	Complete the Abyss Canyon mission with 4.5 million points.