Here is the full list of all 28 Fobia - there are St. Dinfna Hotel achievements.
Upgrade all weapons to max level
Finish the game 3 times
Collect 50 upgrade items
Finish the game without taking damage
Find all the Memories
Find the bug that is not a bug
Just that, find Jonisvaldo
Discover all the toy rabbits throughout the environments
Finish the game
Defeat the Red Light (Aquiles)
Survive the Underground
Upgrade one weapon to max level
Survive the Forest
Survive the Hotel
Discard items 5 times
Assemble the 3 gears
Collect all documents from the survivors
Defeat the Piano Monster
Open all articulated stairs
Kill 10 enemies
Defeat the Spider Mother
Solve the chess puzzle
Use the flashlight for 15 minutes in a single game
Open the storage chest
Combine 4 items
Save the game 3 times
Yes, they're drawers... But not just drawers.
Use the night vision camera for 15 minutes in a single game