Here is the full list of all 47 Sniper: Ghost Warrior 3 achievements worth 1,000 gamerscore.
Owned all Sidearms
Owned all Secondary Weapons
Completed Fourth Act
Completed all Side-Ops on Dam in one playthrough
Owned all Primary Weapons
Neutralized 100% from the Most Wanted list in one playthrough
Completed all Side-Ops on Village in one playthrough
Unlocked all Drone modules
Completed all Side-Ops on Mining Town in one playthrough
Completed Third Act
Drove 100 km in one playthrough
Neutralized 75% targets from the Most Wanted list in one playthrough
Killed 20 Enemy Snipers in one playthrough
Killed 25 Enemies while driving in one playthrough
Hunted and collect 150 Organic Samples in one playthrough
Finded all Collectibles in one playthrough
Distracted 30 Enemies with Luring Bullet in one playthrough
Neutralized 50% targets from the Most Wanted list in one playthrough
Completed Second Act
Done 15 Interrogations in one playthrough
Finded 50% Collectibles in one playthrough
Killed 20 Enemies from above in one playthrough
Done 25 Stealth kills in one playthrough
Killed 5 Enemies from below in one playthrough
Completed First Act
Neutralized 25% the Most Wanted list in one playthrough
Taged 10 Enemies with the CCTV in one playthrough
Survived 500 hits in one playthrough
Taged 30 Enemies with Tagging Bullets in one playthrough
Killed 3 Enemies with 1 bullet
Opened the Loot Box on the Island
Finded 25% Collectibles in one playthrough
Done a headshot from 500 meters using scope 10x
Done a short distance Sniper Rifle kill
Killed an Enemy from a 500 meters distance.
Ran 10 km in one playthrough
Flew 5 km with your Drone in one playthrough
Crafted item from each category at least once
Moved 1 km while crouched in one playthrough
Completed 20 Point of Interest in one playthrough
Traps destroyed drone
Completed 10 Point of Interest in one playthrough
Used Crafting for the first time
Completed 5 Point of Interest in one playthrough
Killed an Enemy with a Sniper Rifle shooting through a wall
Enemies destroyed drone
Completed Prologue