Full list of all 70 Sniper Elite 3 achievements worth 1,440 gamerscore. It takes around 25-30 hours to unlock all of the achievements in the base game.
The base game contains 50 achievements worth 1,000 Gamerscore, and there are 4 DLC packs containing 20 achievements worth 440 Gamerscore.
Hold breath for one hour
Attain a rank of Second Lieutenant (level 31)
Snipe enemies over a cumulative distance of a double marathon
Complete 100% of the campaign on any difficulty
Complete all the optional objectives
Find all the collectible cards
Find all the war diaries
Destroyed all 3 bomb dumps at the same time (Mission 7)
Kill 10 enemies with flint-triggered detonations
Made the target officer's death look like an accident (Mission 5)
Complete a campaign mission without being seen (excluding Tobruk)
Get to the informant without being spotted (Mission 4)
Find all the Sniper nests
Complete all the long shots
Found and killed the visiting General (Mission 3)
Distract 20 enemies with flint or rocks
Kill 20 enemies by shooting explosives
Complete Mission 8
Complete the campaign in co-op
Complete the game on Cadet difficulty
Complete the game on Marksman difficulty
Complete the game on Sniper Elite difficulty
Complete the game on Authentic difficulty
Thrown an enemy off one of the bridges (Mission 8)
Complete Mission 7
Get 30 kills from sniper nests
Find half of the war diaries
Complete Mission 6
Incapacitate 2 vehicles in Kasserine Pass within 5 seconds (Mission 6)
Complete Mission 5
Clear the mountain pass without alerting the enemy (Mission 1)
Complete Mission 4
Complete Mission 3
Complete Mission 2
Hide a body in each of the wells in Gaberoun (Mission 2)
Complete Mission 1
Play 1 mission in each mode (campaign, challenges, competitive multiplayer)
Complete all the challenge missions
Relocate 100 times
Tag 100 enemies or vehicles
Play 10 competitive multiplayer matches
Earn 1 of every ribbon in competitive multiplayer
Get a testicle-shot from over 100m away
Kill 10 snipers before they see/shoot you
Attain a rank of Sergeant (level 11)
Get a kill with each offensive item
Get 20 chain reaction explosive kills
Complete a mission after losing over 500 units of health
Create and save 4 loadouts
Customize 1 rifle
Killed the target by destroying his vehicle.
Killed the target in 7 different ways.
Killed the target by shooting nearby explosives.
Shot the target in his car.
Killed the officer at the meeting with a testicle shot.
Killed the target with a chain reaction.
Killed the target with a grenade.
Crush the target with a bell
Shot and killed the target.
Observed the target and made the right choice.
Complete 'In Shadows'.
Complete the mission without using any healing items.
Get to the command tent unseen and without killing.
Destroy all the teufelsfeuer shipments in the truck depot
Complete 'Belly of the Beast'
Beat Raubvogel's score on the shooting range
Complete 'Confrontation'.
Eliminate a sniper with a stealth takedown.
Spot and destroy 4 enemy traps without triggering them.
Kill the teufelsfeuer soldiers in the coliseum.