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