Wolfenstein II: The New Colossus
80 Achievements
60-80h
Ghost
Finish a District without triggering an alarm
12.1%
How to unlock the Ghost achievement in Wolfenstein II: The New Colossus - Definitive Guide
EDIT: Heraizen has provided a video guide for those who want it:
EDIT 2: This achievement is known to be buggy. First of all, it appears you have to do this on your first time playing through a district (replaying it won't work). Secondly, it seems that this achievement can simply glitch out and not be obtainable on certain save files. The only surefire solution is to simply start a new save game.
I also restarted multiple times because of setting off alarms. My ghost run was the 1st time I actually FINISHED it though, so the whole needing to so it on your first completion of a district is probably true. My successful run had 2 or 3 instances of you're-about-to-be-seen slowmo, with the last one being the guy that actually did see me before I put a bullet in his skull.
1) Once the level starts crouch and head straight until you see two guys. Shoot them in the head with the silenced pistol. Now follow the catwalks to the right of you and you will see a flying enemy above you, either wait for it to move or duel silence pistol it down.
2) Follow the right side of the map. Eventually you'll jump over a fence into water and get out, then go through a foggy spot, then to a tractor. Head around the tractor to the back of the house and head up the stairs. Now the commander is either in the kitchen (to your left) or upstairs (to your right), either way watch out for the dog. One silenced pistol bullet to the noggin and he's dead.
3) Now either head outside through the front or back door and to your right to the last guy. I followed the right side of the map to get his dog away from him and killed his dog. After killing the dog crouch walk away because the commander and another guy will walk towards the dead dog. Time your head shots for both OR head shot the normal enemy and hatchet the commander OR hatchet both....doesn't matter really. Pick up card if you need it and/or head back to base.
This achievement is best done while revisiting the Mesquite - Farmhouse district.
Once the mission begins, crouch, move forward, and stealthily eliminate the two guards directly ahead either with silenced headshots or throwing hatchets. Now move to the right and hug the wall as you make your way north. Following the right-hand side of the area, continue to move at a steady pace until you hit a wooden fence. Climb this fence, drop into the water, and swim across to the other side of the yard.
At this point, make a manual save. Now continue moving north while staying as far to the right as possible. You'll eventually reach the farmhouse. Make your way to the back of the farmhouse and enter the kitchen through the backdoor. There is a lone Commander patrolling the first floor of this house. Eliminate him quietly.
Exit the house the way you came in and continue hugging the right-hand side of the yard while making your way to the Übercommander's location. He is accompanied by a kampfhund and a single Nazi soldier. Move in closely and be ready with your silenced Pistole. Cap the Übercommander in the head, then do the same to his Nazi friend. This will almost instantly trigger a response from the kampfhund, so be ready to put him down, too. If done quickly enough, you should have eliminated all three of these targets without triggering any sort of alarm. Should that be the case, pick up the Übercommander's death card and exit the mission.
This achievement will then unlock upon returning to Eva's Hammer.