Here is the full list of all 13 Stories Untold achievements. It takes around 2-3 hours to unlock all of the achievements on Windows.
Find the photographs.
Get all other achievements.
Finish Episode 4.
Find all recordings in Ward 4.
Be hygiene conscious in Ward 4
Finish Episode 3.
Get out of the station.
Respond to the messages correctly.
Learn more about yourself.
Finish Episode 2.
Get things up and running.
Finish Episode 1.
Find the code.