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.
Unlocked the mysterious lock
Picked up the ice picks
Found a page from Leonore's Journal
Found the torch
Survived the plane crash
Found the plane's door
Experienced the dream
Found the broken valve
Stuck in place
Moved past the insects
Placed the bomb in the pub
Entered the bunker
Did what needed to be done
Found all the pages in Leonore's Journal