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Blue Prince: Room 46 Guide

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On April 27, 2025

literally has a new puzzle around every corner, and after a while, it gets hard to keep track of the literal hundreds of clues and leads that fill the Mt. Holly Estate.

Blue Prince: How to Open the West Gate Path

How to open the brown gate outside of the manor, permanently.

The most sought-after and all-encompassing mystery to solve on Mt. Holly is, without a doubt, figuring out how to enter the mysterious 46th Room of the manor. It’ll take some time, and likely more than a few in-game days, to make your way to Room 46, but it’ll also be much easier thanks to our detailed guide on how to find, unlock, and reach the entrance to the final room in the mansion.

Reach the Antechamber

Room 46 is located on the north side of the Antechamber at the north end of the manor. You’ll need to create a path to one of the other three doors on the west, south and east sides of the Antechamber, and then find and pull the corresponding lever hidden in one of the rooms of the house

West Door Lever Location

The lever that unlocks the western door can be found inside the Secret Garden, which is only accessible by finding a Key to the Secret Garden, and then using it to unlock one of the rooms on the east or west edges of the house.

Once inside the Secret Garden, head over to the end of the gravel path and look at the weathervane in the center. To either side, there are rotating controllers that you can use to rotate the two other parts of the weathervane to face the same direction as the metal rooster on top. This will open up a hatch in the wall across from it, revealing the lever.

South Door Lever Location

The lever that unlocks the southern door to the Antechamber can be found in one of the side rooms inside the Great Hall. The layout of the subrooms in the Great Hall changes every day, so we recommend either collecting a lot of keys, checking out the current day’s layout in the Drafting Studio, or drafting a Foyer to unlock all the doors automatically.

East Door Lever Location

The east door lever of the Antechamber is located inside the Greenhouse, but will be broken when you first come across it. You’ll need to find the broken lever item somewhere in the house (it drops like any other special item), and place it on the broken lever to repair and activate it.

We often seem to find the broken lever inside the Workshop, on top of the table across from the crafting bench. We also have been able to dig it up from soil patches throughout the house, and found it inside locked chests as well. We recommend purchasing a metal detector and trying to track down a lucky rabbit’s foot to increase item drops.

Once one of the doorways to the Antechamber is opened and you’ve made an accessible path of rooms that leads to the doorway, you’ll need to find the lever that opens the north door.

Enter the Underground Reservoir

The lever to open the north door of the Antechamber is located deep within the basement. If you haven’t unlocked your own path to the underground section of Mt. Holly yet, you can read our guide to every way to enter the basement. We recommend using the Foundation entrance for a quicker path, so you won’t need to journey back through the entire building or use the boat to cross the reservoir.

Blue Prince: Every Way to Enter the Basement

Every entrance to the Underground areas of Mt. Holly Estate.

Crossing the Reservoir

If you entered using the Tomb or the Fountain entrances, you’ll need to make your way across the reservoir to reach the next area. This will require drafting the pump room and lowering the reservoir to one level below the maximum. This will make the rowboat accessible and allow you to cross over to the other side.

We recommend filling up the Reservoir to full, then placing the contents of the kitchen’s water into one of the two main tanks. Then, fill the remaining contents of the tank with one of the levels from the Reservoir. Crossing the water of the reservoir is as simple as walking up to the boat and interacting with it (though it is a surprisingly long ride).

Cross the Rotating Platform

Through the center doorway on the north side of the Reservoir (near the Foundation), you’ll find a rotating platform with two bridges, with a series of rooms placed around the circle and a high-tech tunnel directly across from you. You’ll need to solve the puzzle by rotating the platform using the mechanisms and walking across it, then rotating it again (or raising it) at the next spot in the circle.

A few details to note:

There is a secret blueprint you can add to your drafting pile in the room with a lantern and marble table.
Pushing the minecart to the Fountain side of the Reservoir gives you access to the mineshaft entrance.
There’s a third entrance to the circle hidden in the room directly counter-clockwise from the mineshaft entrance.
The platform does not need to be raised to reach the tunnel to the lever.

Pull the Final Lever

Once you reach the tunnel, continue down it, interact with the unlocked metal gate door, and make your way to the end. There will be eight doors along a curved wall, with a lever in the center with a moon symbol above it. Pull the lever to open the northern doorway, then make your way back up to the house (again, we recommend the Foundation entrance) and enter the door to Room 46 via the Antechamber. The first time you reach the room, a cutscene will play, followed by the end credits for the game.

If you choose to continue after watching the cutscene and credits, you will start at the beginning of the next day. To actually enter and explore Room 46, you’ll need to repeat all the steps above again (you can pull the northern lever before reaching or unlocking the Antechamber). We won’t spoil the prizes you’ll find inside once you reach Room 46, but they are definitely items to be treasured.