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

Animal Party (40): Unlock all the animals.
Basic Huting Skills (10): Move around a level.
Best Hunter (40): Win your first multi player game.
Better Luck Next Time (40): Lose your first multi player game.
Blind Hunt (25): Hunt one animal from a blind.
British Columbia Hunter (30): Finish all missions from British Columbia Early Fall.
Call to Arms (10): Hunt any animal by calling it to your location.
Cats in the Bag (30): Hunt every type of cat (Bobcat, Lynx, etc.).
Competitive Hunter (10): Play your first multi player game.
Complete Hunter (30): Hunt 1 of each animal type.
Don't Just Stand There, Shoot (20): Hunt 5 animals from a stand.
Duck Hunter (15): Hunt 10 ducks using a shotgun.
Early Fall Hunter (30): Finish all missions from the Wyoming early fall environment.
Elk on the Loose (10): Hunt 2 elk.
Fall Hunter (30): Finish all missions from the fall environment.
Fashion Victim (20): Unlock all types of clothing.
Firearms Collection (30): Unlock all firearms.
Fox Trot (30): Put 10 foxes in your trophy room.
Gearing Up (20): Unlock all items.
Get a Tail Feather (20): Hunt 10 pheasants.
Get to Know (10): Bag 1 animal.
Grouse Hunter (10): Hunt 5 Grouse.
Hunting Frenzy (20): Hunt 10 animals.
I'm the Best (30): Win all missions from multi-player mode.
Inspector (30): Inspect your first track.
Learn to Track (10): Track down you first animal.
Looks Real to Me (10): Hunt any animal by using a decoy.
Lure the Animals (10): Use all the lures (including decoys and bait).
Marksman Level 1 (20): Shoot one animal using any shotgun.
Mission Accomplished (40): Win all the missions.
Missions Man (10): Finish one mission on normal difficulty.
Moose Fanatic (20): Fill your trophy room with Moose mounts.
Night Hunter (15): Hunt 2 of each night animal.
Odor-Free (30): Use all the scent items in the game.
Rabbit Race (10): Collect your first trophy.
Rabbit's Foot (20): Kill 10 rabbits using any allowed firearm.
Revolver (20): Hunt any animal using the handgun.
Rules and Regulation (20): Hunt 10 times without breaking any rules.
Sheep Double (10): Hunt one bighorn sheep and one Dall sheep.
Sixth Sense (10): Enter Sixth Sense for the first time.
This is My Turf (20): Win all the missions form early fall environment in multi player.
Top Gun (20): Finish one mission on realistic difficulty.
Trophy Collector (15): You filled your trophy room.
Turkey Shoot (10): Hunt 5 turkeys.
Ultimate Hunter (30): complete all missions from any environment.
Winter Hunter (30): Finish all missions from the winter environment.
Zero Magnification (30): Win a mission without using any scope or Binoculars.