Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	Description
Elemental ( 25 points )	Get 25 kills with any of the hidden elementally charged Cleavers in Horde.
Force Multiplayer ( 25 points )	Win a match of Guardian on all Forces of Nature maps.
Force Multiplier ( 50 points )	Kill a Lambent Berserker with a team comprised of 5 Forces of Nature characters in Horde.
Horde Natural ( 20 points )	Complete 20 consecutive waves of Horde on any Forces of Nature map without going down or dying.
Hunter Gatherer ( 20 points )	Bag and Tag 20 opponents while playing as the Savage Hunter in Versus multiplayer ( any mode).
I've Got This! ( 20 points )	Kill 10 opponents as the leader in a round of Guardian on a Forces of Nature map.
Natural Selection ( 20 points )	Complete all 12 waves of Beast on all Forces of Nature maps.
Stock Piled ( 20 points )	Achieve the maximum level on all fortifications in Horde mode.
Unstoppable Force ( 25 points )	Complete all 50 waves of Horde on any of the Forces of Nature maps.
Witty Repairtee ( 25 points )	Build or repair 50,000 worth of fortifications as Mechanic Baird LE.