The Black Bell Secret Room: How to Open the Hidden Wall in the Attic

To open the hidden wall in The Black Bell's attic, pull the highlighted book. The book is the switch: pull it and the wall opens on the spot — no key, code, or dialogue choice is involved. Behind it sits the secret chamber with the black bell and the black pearl on display, and you can pick one up the moment the wall is open.

Pull the highlighted book in the attic

Once you're inside the attic, the guiding voice sets the task: "There should be a hidden wall somewhere in that room. Find a way to open it." Find the book that shows as highlighted and pull it — "Just going to pull the highlighted book. There we go" — and the wall is open.

There's nothing to solve after the pull. The wall opens straight onto the chamber: the black bell and the black pearl are both visible and takeable right away, with a small skeleton nearby. No second lock, lever, or puzzle stands between the book and the items.

If you haven't reached the attic yet

Two things stand between you and that room:

1. The attic key. The attic door is locked, and the voice points you to the piano room: "I think there might be a key in the piano room. Check there." In one observed run the key simply appears in that room — also called the mannequin room — and the attic door opens once it's grabbed. If the mannequins themselves are what's tripping you up, the Black Bell mannequin puzzle guide covers that room.
2. A ladder. An unlocked door isn't enough — the voice warns, "You'll need something to get up there. Look for a ladder." It's in the basement, but its exact spot isn't pinned down. One player grabbed a lookalike object the game rejected ("Apparently, this does not count as a ladder") and only found the real ladder after searching the other side of the basement, so check both halves before assuming it's not there.

The Black Bell attic key and ladder walkthrough steps through that run in more detail.

Know the voice lies before you take anything

The same voice that ends its hidden-wall hint with "take the black bell" contradicts the game's opening instructions to find the pearl and never touch the bell. Players who take an item are promptly told "You touched it. I never told you that," and later, "Whatever you do, don't listen to me. It's not me."

Opening the wall and reaching the chamber is where this guide ends. What taking the bell or the pearl leads to is its own decision — the good ending guide covers the escape route's outcome, and the Black Bell black pearl guide covers the pearl's side.