Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
Deep Cover (20 points)	Complete Riley's interrogation.
First Blood (10 points)	Escape the pirates and survive in the wilderness.
Hands Off My Stoner (20 points)	Rescue Oliver from the pirates.
Have I Told You? (50 points)	Survive the encounter with Vaas and escape.
Higher Than a Kite (20 points)	Use your wingsuit to reach the Southern island.
Magic Mushroom (20 points)	Return to the doctor with the cave mushrooms.
One of Us (20 points)	Complete the Rakyat initiation.
Poker Night (50 points)	Kill Hoyt.
Retake Wallstreet (20 points)	Rescue Keith from Buck.
Taken for Granted (50 points)	Kill Vaas.
What a Trip (100 points)	Attend the final ceremony.
Worst Date Ever (20 points)	Rescue Liza from the burning building.