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