Full list of all 77 Sniper Elite 3 achievements. It takes around 60-80 hours to unlock all of the achievements in the base game on Windows.
The base game contains 51 achievements, and there are 6 DLC packs containing 26 achievements.
Complete the game on Marksman difficulty
Complete the game on Sniper Elite difficulty
Hold breath for one hour
Attain a rank of Second Lieutenant (level 31)
Complete the campaign in co-op
Complete the game on Authentic difficulty
Complete all the challenge missions
Snipe enemies over a cumulative distance of a double marathon
Play 1 mission in each mode (campaign, challenges, competitive multiplayer)
Play 10 competitive multiplayer matches
Earn 1 of every ribbon in competitive multiplayer
Kill 10 enemies with flint-triggered detonations
Get a kill with each offensive item
Incapacitate 2 vehicles in Kasserine Pass within 5 seconds (Mission 6)
Throw an enemy off one of the bridges (Mission 8)
Complete 100% of the campaign on any difficulty
Complete a mission after losing over 500 units of health
Get 20 chain reaction explosive kills
Relocate 100 times
Complete Mission 8
Complete the game on Cadet difficulty
Find all the Sniper nests
Complete all the optional objectives
Find all the war diaries
Find all the collectible cards
Complete all the long shots
Complete Mission 7
Destroy all 3 bomb dumps at the same time (Mission 7)
Kill 10 snipers before they see/shoot you
Complete Mission 6
Get 30 kills from sniper nests
Complete Mission 5
Make the target officer's death look like an accident (Mission 5)
Kill 20 enemies by shooting explosives
Attain a rank of Sergeant (level 11)
Find half of the war diaries
Complete Mission 4
Complete a campaign mission without being seen (excluding Tobruk)
Get to the informant without being spotted (Mission 4)
Distract 20 enemies with flint or rocks
Complete Mission 3
Find and kill the visiting General (Mission 3)
Tag 100 enemies or vehicles
Clear the mountain pass without alerting the enemy (Mission 1)
Get a testicle-shot from over 100m away
Complete Mission 2
Hide a body in each of the wells in Gaberoun (Mission 2)
Complete Mission 1
Create and save 4 loadouts
Customize 1 rifle
Own Sniper Elite, Sniper Elite V2 and Sniper Elite 3
Kill the target with a chain reaction
Kill the target in 7 different ways
Kill the target in the vehicle by shooting its weakspot
Kill the officer at the meeting with a testicle shot
Kill the target with a grenade
Kill the target by shooting nearby explosive barrels
Crush the target with a bell
Shoot and kill the target
Observe the target and correctly choose to leave or kill
Shoot the target in his car
Complete 'In Shadows'
Complete the mission without using any healing items
Get to the command tent unseen and without killing
Complete 'Belly of the beast'.
Destroy all the Teufelsfeuer shipments in the truck depot.
Hit all the targets on the shooting range.
Complete 'Confrontation'.
Spot and destroy 4 enemy traps without triggering them.
Kill the Teufelsfeuer soldiers in the coliseum.
Eliminate a sniper with a stealth takedown.
Take out two of the AA gun crews with special explosive events.
Snipe the soldier in the tower far, far away.
Blow up the soldier in the distant tower using heavy artillery.
Find and set up the MG42.
Earn Gold on all ranges (Shooting Range).
Find and shoot the 10 hidden explosives (Shooting Range).