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