Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock	Type
Fastest Man in the Swamp	Complete an Extreme Challenge in End of Zoe.	20
King of the Swamp (secret)	Complete End of Zoe on Joe Must Die.	50
Promise Kept	Complete End of Zoe on Easy or Normal.	20
Queensberry Rules	Perform a 4-hit combo with your bare fists in End of Zoe.	20
Swamp Warfare	Stealth kill 5 enemies in End of Zoe.	20
The Only Guns You Need	Complete End of Zoe on Normal or Joe Must Die using no weapons.	40