Room 46 — Complete Walkthrough via Antechamber & Basement

Updated May 25, 2026 · 12 min read · Real chain from wiki

Reaching Room 46 is the first major goal in Blue Prince. The room itself sits on Rank 10 — one step beyond the standard 5×9 mansion grid — and the only way in is through the Antechamber on Rank 9 center. The Antechamber's four doors are locked by default; unlocking any of them requires finding one of three lever rooms, then descending into the basement to clear the Inner Sanctum gear puzzle and pull a north lever. This page is the full chain.

The Big Picture

Blue Prince's mansion grid is 5 columns × 9 ranks (45 rooms). Two positions are fixed and don't need to be drafted:

• Entrance Hall — Rank 1 center. Where every day starts.
• Antechamber — Rank 9 center. Gateway to Room 46.

Room 46 sits on Rank 10 — the only room on that rank. It is not drafted; the Antechamber's north door is the door to Room 46, but it stays locked until you've done the full chain.

Step 1: Pull an Antechamber Lever

The Antechamber has four doors (N, S, E, W), all locked at the start. Each door's lever lives in a specific other room:

Practical advice: aim for the Great Hall lever first. The Secret Garden lever works but you need the Secret Garden Key (drops in Billiard Room dartboard rewards, Music Room, or Locksmith). The Greenhouse lever is broken — don't waste a run on it.

Step 2: Enter the Antechamber

With one door unlocked, build a draft path from the Entrance Hall up to Rank 9 center. Pick rooms with branching exits — straight-shooting at Rank 9 is dangerous because you may run out of gems or keys mid-climb.

Inside the Antechamber:

• A pillar rises from the floor on first entry, containing:
• The Basement Key — opens both basement access points.
• An Allowance Token — raises your daily allowance.
• A note: "To continue up, one must go down."

Step 3: Reach the Basement

There are two entry points to the basement. You only need one to make progress, but the other unlocks too if you use the key there as well — both stay open permanently per save.

Entry A: Foundation Elevator

The Foundation is a draftable room. If you draft it, an elevator inside leads down. Use the Basement Key on the bottom-floor door.

Entry B: The Drained Fountain Well

Outside the manor sits a fountain. Inside the Pump Room, drain the fountain completely (see the Pump Room guide). The water drains, exposing stone stairs descending into a well. Use the Basement Key on the door at the bottom.

Step 4: The Inner Sanctum Gear Puzzle

The basement's main obstacle is a giant gear puzzle room. The room contains:

• A central gear that can be raised and lowered.
• Rotating platforms around the gear.
• Terminals on different sides of the room.
• A lower platform that needs to align with the Underpass tunnel.

The mechanism:

1. Walk to each side's terminal. Each terminal rotates the platforms in a different way.
2. Sequence the rotations so the lower platform connects to the Underpass.
3. Raise the gear to open the connecting passage.
4. Enter the Underpass via the door at the bottom of the fountain side. Push the minecart that's blocking the tunnel to clear it.
5. Reach the Inner Sanctum.

Step 5: Pull the North Lever, Walk Up to Room 46

Inside the Inner Sanctum is the north lever — the one that opens the Antechamber's north door, which is the actual door to Room 46.

Pull the lever. Walk back up — through the Underpass, back through the basement, back up to the Antechamber. The north door is now open. Step through.

First time you enter Room 46: a cutscene plays, credits roll, the day ends. You've earned the Inheritance Trophy.

Future entries: no cutscene. You can explore Room 46 freely — and the game opens up considerably from here, including the Throne Room route and the deeper "true" endings.

Speedrun & Single-Day Strategies

If you want the Day One Trophy (reach Room 46 in a single run), you need expert RNG manipulation:

• Pre-have the Foundation, the Pump Room sequence, and a known lever-room path drafted from prior runs (Antechamber door state and basement doors persist).
• Open with rooms that have multiple branching exits — never commit to a single corridor.
• Always have at least one gem and one key in reserve as you push toward Rank 9.

For the Cursed Trophy, the same chain works but you're capped at 13 steps per day — your route planning has to be exact.

Room 46 FAQ

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