Here is the full list of all 50 Wolfenstein: The New Order achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Unlock tactical perk 5
Unlock tactical perk 4
Unlock assault perk 6
Unlock assault perk 8
Unlock tactical perk 8
Unlock assault perk 4
Locate the underwater stash
Unlock demolition perk 1
Unlock stealth perk 6
Unlock stealth perk 8
Find the Laserkraftwerk
Unlock assault perk 3
Locate the resistance
Unlock tactical perk 2
Unlock stealth perk 5
Unlock stealth perk 3
Unlock assault perk 2
Unlock stealth perk 7
Choose to save Fergus
Unlock tactical perk 3
Unlock assault perk 1
Unlock tactical perk 1
Unlock stealth perk 2
Unlock stealth perk 1
Save allied planes
Complete game on any difficulty
Collect all gold items
Release friend
Collect all letters
Collect 25 gold items
Defeat the London Monitor
Choose to save Wyatt
Complete game on I AM DEATH INCARNATE! (or ÜBER)
Complete game on ÜBER
Solve the first Enigma code
Solve the second Enigma code
Solve the third Enigma code
Solve the fourth Enigma code
Unlock stealth perk 4
Unlock tactical perk 6
Unlock tactical perk 7
Unlock assault perk 5
Unlock assault perk 7
Unlock demolition perk 2
Unlock demolition perk 3
Unlock demolition perk 4
Unlock demolition perk 5
Unlock demolition perk 6
Unlock demolition perk 7
Unlock demolition perk 8