Here is the full list of all 50 Wolfenstein: The New Order (DE) achievements.
Solve the third Enigma code
Collect all gold items
Collect all letters
Solve the fourth Enigma code
Solve the second Enigma code
Solve the first Enigma code
Unlock demolition perk 7
Unlock demolition perk 5
Collect 25 gold items
Unlock demolition perk 4
Unlock demolition perk 6
Choose to save Wyatt
Unlock demolition perk 3
Complete game on any difficulty
Complete game on I AM DEATH INCARNATE! (or ÜBER)
Complete game on ÜBER
Release friend
Unlock assault perk 7
Unlock demolition perk 8
Defeat the London Monitor
Unlock tactical perk 7
Unlock stealth perk 6
Unlock stealth perk 4
Unlock tactical perk 8
Unlock demolition perk 2
Unlock assault perk 5
Unlock tactical perk 6
Unlock assault perk 8
Locate the underwater stash
Unlock tactical perk 5
Unlock assault perk 6
Unlock stealth perk 8
Find the Laserkraftwerk
Locate the resistance
Unlock assault perk 4
Unlock assault perk 3
Unlock tactical perk 2
Unlock tactical perk 4
Unlock stealth perk 3
Unlock stealth perk 7
Unlock assault perk 2
Choose to save Fergus
Unlock tactical perk 3
Unlock stealth perk 5
Unlock tactical perk 1
Unlock assault perk 1
Unlock stealth perk 2
Unlock stealth perk 1
Unlock demolition perk 1
Save allied planes