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