Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock
A Trusty Old Friend (15 points)	Kill 5 enemies within 10 seconds using any rifle.
Avid Shopper (15 points)	Purchase all items from the supply shack.
Bar Brawl (10 points)	Melee kill an enemy using a bottle.
Blade of Justice (15 points)	Perform 25 special stealth kills with the knife.
Challenging (20 points)	Complete any Challenge Tomb.
Compulsive (30 points)	Complete every Challenge.
Craftswoman (15 points)	Craft 5 pieces of Equipment.
Dead Ringer (15 points)	Get 25 headshots using the Bolt-Action Rifle.
Fall Guys (10 points)	Kill 5 enemies by shooting them in the leg.
Firestarter (10 points)	Defeat 2 enemies or more using a single Molotov Cocktail.
Fluent (15 points)	Reach max proficiency in any language.
Gilded (15 points)	Complete a level in Score Attack with a gold score.
Glub Glub Glub (15 points)	Drown 3 enemies using a water finisher.
Trick Shot (10 points)	Shoot a bottle out of the air.
Good Samaritan (15 points)	Complete 3 Missions.
Keen Eye (15 points)	Unearth 40 Survival Caches.
Laying Down the Law (25 points)	Kill 6 enemies with the Revolver without reloading.
Looking for Trouble (15 points)	Complete 5 Challenges.
My Own Worst Enemy (15 points)	Complete a level in Score Attack with a score multiplier of 2 or more.
No Guts, No Glory (15 points)	Perform a 2.5 second or longer swan dive.
One-Sided Conversation (10 points)	Stealth kill an enemy while they are having a conversation.
Quick and Painless (20 points)	Shoot 15 deer in the heart.
Rapid Recovery (10 points)	Heal yourself in combat 3 times.
Renegade (15 points)	Melee 5 enemies off a ledge.
Self-Improvement Junkie (15 points)	Purchase all skills in a single category.
Siberian Ranger (20 points)	Beat 15 combat encounters after completing the game.
Rotisserie (15 points)	Shoot a chicken out of the air with a fire arrow.
That All You Got? (15 points)	Complete 3 Replay Challenges in one Score Attack.
The Price of Truth (150 points)	Finish the game on any difficulty.
These Belong in A Museum (25 points)	Collect 300 Cards.
Tomb Raider (50 points)	Complete all Challenge Tombs.
Triple Threat (20 points)	Kill 3 enemies with 1 Shotgun blast.
Truth Seeker (15 points)	Collect 25% of all narrative assets (relics, murals and documents).
Voices of the Past (30 points)	Collect 75% of all narrative assets (relics, murals and documents).
Was That Really Necessary? (10 points)	Kill any animal with an explosive.
Way to Go (25 points)	Complete every level in Score Attack with a bronze score or better.
Weaponsmith (15 points)	Fully upgrade any weapon.
Well Begun Is Half Done (25 points)	Complete 10 levels in Score Attack with a gold score.
Woman of the People (30 points)	Complete every Mission.
Zipper (15 points)	Perform a manual zip line transfer.