No missable achievements (plus 24 unknown)
Sign in with Steam or Xbox to track your progress, and:
Shoot an enemy through a wall.
Deliver 50 headshots.
Kill 2 enemy with one shot.
Kill 15 enemy using concentration mode.
Deliver 100 headshots.
Complete Act 1.
Kill 2 enemy with one grenade.
Complete Act 2.
Kill all enemies attacking your pontoon from the riverside on 'Weaken The Regime' level.
Complete Act 3.
Kill a total of 30 enemies with Browning gun.
Finish the game on Easy difficulty.
Complete Act 4.
Kill 10 enemies with throwing knives.
Finish the game on Normal difficulty.
Kill 10 birds.
Shoot 5 cable lines using sniper rifles.
Finish the game on Hard difficulty.
Collect all secrets.
Kill 250 people using sniper rifle. (Multiplayer)
Win 50 rounds playing online. (Multiplayer)
Kill 500 people using sniper rifle. (Multiplayer)
Kill 250 people using pistol. (Multiplayer)
Kill 2000 enemies. (Multiplayer)