Welcome to my 100% Achievement Guide for Ghost Files (MOAC)!
(Note, When there is no commentary in the video, i had to mute for copyright reasons)
This is unmissable as you have to do a few of these during the game.
This will unlock when you are at Murphys bedside in the hospital in chapter 6.
You have to do 3 very easy puzzles and achievement will unlock.
Go to 2:18:35 to see the start of it and 2:20:20 to see the end.
Hope This Helps!