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