How to Reach Room 46 in Blue Prince

The very first thing you're told when you begin Blue Prince is that in order to receive your inheritance, you need to reach the fabled Room 46. With a house grid of 45 possible rooms, it's not just a matter of reaching the end of the house and getting into Room 46 though…

It's important to know that the core of Blue Prince is in discovery so be sure to explore the mansion, unlock as many rooms as you can, and scour them for secrets and clues. 

Major Spoilers for Blue Prince will follow but we will reveal each step one by one so once you're content with what you've learned you can stop and continue to explore the game on your own.

How to Reach Room 46

Reach the Antechamber

As you enter the mansion, you'll immediately notice that just like the Entrance Hall is always filled in and that the Antechamber is at the far end of the House. By placing rooms and carefully managing your steps, keys, and gems you'll be able to draft a room up to the side of the Antechamber.

Unlock an Antechamber Door

If you've drawn a room up to the Antechamber you'll discover that the doors at each side are actually locked. You'll need to find a way to open them. The three ways that you can open the different gates are as follows:

• West Antechamber Door: Obtain the special key to the Secret Garden Room, you must use this on the far left or right column of the house when it prompts you to use a key. Once inside solve the puzzle by having all three arrows of the fountain point towards the wall. Once you do a level will appear, flipping it will open the West Antechamber Door.
• South Antechamber Door: Draft the Great Hall, this room has a door at either and and then three on each side. Behind one of the doors on the sides will be a lever to pull
• East Antechamber Door: Obtain the Broken Lever and draft the Greenhouse. Inside you can affix the Broken Lever to the wall and flip it.

Because of how many chances there are to obtain a Major Key – The Billiards Room, the music room, locked chests, the attic – the Secret Garden has become my most consistent way to reach the interior of the Antechamber.

Obtain the Basement Key

You're now in the Antechamber and you've found you're unable to head further North, but you do have a hint in the form of a note and a Basement Key.

"To Continue Up You Must Go Down"

From here you should make your way to a Basement Door to continue.

Make your way to the Sanctum

You can find two Basement Doors early on, the first of which can be found by lowering the Fountain (by drafting the Pool and the Pump room) and the second is by drafting the Foundation and then enabling its elevator and making your way downstairs.

After completing the shifting gear puzzle you'll find your way to the Inner Sanctum where there's eight doors and a level for the North Antechamber Door. You'll be able to do more with those doors later so just keep them in mind for now

Unlock Room 46 Door

Now that you've unlocked the door to Room 46 you simply need to have a day where you're able to open and reach one of the Antechamber doors and have unlocked the doorway to Room 46 to progress.

It's important to note that every day that resets all of the Antechamber doors will reset so each time you want to reopen Room 46 you'll need to travel back to the Inner Sanctum.