Here is the full list of all 35 Cabela's Hunting Expeditions achievements worth 1,000 gamerscore.
Hunt the First Trophy
Collect the first 5 Flags from the vehicle hunts
Collect 25 Flags from the vehicle hunts
Hunt 5 Trophies from at least 200 yards away
Hunt 15 Trophies from a Shooting Rest
Shoot a Trophy from optimal distance
Obtain all the Gold medals
Mark 20 big game animals
Hunt 3 attacking animals in a single mission
Hunt 8 attacking animals
Unlock your first firearm
Finish the first hunting mission
Hunt a big game animal from at least 70 yards away
Activate 20 Hilltop Spotting locations
Activate 15 Shooting Rests
Mark 10 Trophies in Strategic View
Earn 180 GP in one hunt
Claim an animal on 5 Quick Hunt levels
Claim an animal on all Quick Hunt levels
Hunt 4 animals in the vehicle hunts
Hunt 10 small game animals
Claim more than 20 animals in Quick Hunt
Hunt 20 animals with rifles
Hunt 20 animals with Semi-Auto firearms
Hunt 20 animals with Lever Action firearms
Hunt one Cape Buffalo, Elephant, Leopard, Lion and White Rhino
Unlock all the gun parts
Unlock all the Semi-Auto firearms
Unlock all the Lever Action firearms
Find 50 animal tracks
Earn 25,000 XP from a single Trophy
Unlock all the Rifles
Reach the highest level possible
Reach 500,000 XP
Gather all the Flags from the vehicle hunts