Here is the full list of all 9 Knock-Knock trophies - there are 5 bronze, 2 silver and 2 gold.
Chose to go into the woods
Chose to lock The Lodger inside the cabin and remain hidden
Remembered the story of the Lost Child
Entered ten haunters
Saw all fragments of reality
Managed to hide succesfully ten times
Turned into a doppelganger
Entered a breach
Found five diary pages