Here is the full list of all 14 The Fidelio Incident achievements. It takes around 2-3 hours to unlock all of the achievements on Windows.
Did what needed to be done
Entered the bunker
Found all the pages in Leonore's Journal
Placed the bomb in the pub
Moved past the insects
Stuck in place
Found the broken valve
Experienced the dream
Found the plane's door
Unlocked the mysterious lock
Picked up the ice picks
Found the torch
Found a page from Leonore's Journal
Survived the plane crash