Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
Cavernous Stumble (20 points)	Complete Hagar Caves in The Scorchers job path.
Fired Up! (25 points)	Complete Scorcher Base in the The Scorchers job path.
Foursome (15 points)	Win with a Four of a Kind in the Video Poker minigame.
Lucky Charms (15 points)	Bet and win on Green in the Roly-Poly minigame.
Night Terrors (70 points)	Finish the Campaign on Ultra Nightmare difficulty.
Plans Refined (25 points)	Complete Refinery in The Scorchers job path.
Rebar Pie (15 points)	Pin an enemy to a surface with a Rebar ammo shot.
Rite of Passage (25 points)	Complete Wellspring Tunnels in The Scorchers job path.
Thrash Canyon (25 points)	Complete Bash Canyon in The Scorchers job path.
Wall Hack (15 points)	Kill 2 enemies with one Railgun Slug shot through a wall.