Here is the full list of all 48 Sniper Ghost Warrior 3 achievements. It takes around 30-35 hours to unlock all of the achievements on Windows.
Unlock all Achievements
Unlock all Primary Weapons
Complete all Side-Ops on Dam in one playthrough
Own all Sidearms
Complete Fourth Act
Unlock all Secondary Weapons
Kill an Enemy with a Sniper Rifle shooting through a wall
Kill 25 Enemies while driving in one playthrough
Drone destroyed by Traps
Distract 30 Enemies with Luring Bullet in one playthrough
Kill 3 Enemies with 1 bullet
Complete all Side-Ops on Village in one playthrough
Find all Collectibles in one playthrough
Kill 20 Enemies from above in one playthrough
Neutralize 100% from the Most Wanted list in one playthrough
Complete Third Act
Drive 100 km in one playthrough
Unlock all Drone modules
Neutralize 75% targets from the Most Wanted list in one playthrough
Tag 10 Enemies with the CCTV in one playthrough
Kill 20 Enemy Snipers in one playthrough
Tag 30 Enemies with Tagging Bullets in one playthrough
Hunt and collect 150 Organic Samples in one playthrough
Find 50% Collectibles in one playthrough
Complete Second Act
Complete all Side-Ops on Mining Town in one playthrough
Neutralize 50% targets from the Most Wanted list in one playthrough
Survive 500 hits in one playthrough
Do 25 Stealth kills in one playthrough
Do 15 Interrogations in one playthrough
Kill 5 Enemies from below in one playthrough
Complete First Act
Find 25% Collectibles in one playthrough
Do a headshot from 500 meters using scope 10x
Kill an Enemy from a 500 meters distance.
Neutralize 25% the Most Wanted list in one playthrough
Drone destroyed by Enemies
Craft item from each category at least once
Open the Loot Box on the Island
Do a short distance Sniper Rifle kill
Run 10 km in one playthrough
Complete 20 Point of Interest in one playthrough
Move 1 km crouching in one playthrough
Complete 10 Point of Interest in one playthrough
Fly 5 km with your Drone in one playthrough
Use Crafting for the first time
Complete 5 Point of Interest in one playthrough
Complete Prologue