Accomplish the indicated achievement to get the number of Gamerscore points:

Achievement	How to unlock
A Meeting of the Minds ( 20 points )	Completed "A Meeting of the Minds".
Bog Walker ( 40 points )	Discovered all locations within Point Lookout.
The Local Flavor ( 20 points )	Completed "The Local Flavor".
Walking With Spirits ( 20 points )	Completed "Walking With Spirits".