Who’d think opening doors would be this tricky—case in point: the Blue Door in Blue Prince. Unlike Roblox’s Doors, this mysterious door, located deep within the game, doesn’t come with clear instructions, leaving many players wondering how to open the Blue Door in Blue Prince. That’s we’re we come in. If we can get you out of the Terminal Escape Room, you bet your bottom we can teach you how to open doors.
In this guide, we will walk you through every step to open the Blue Door in Blue Prince and what puzzles await you.
How to Open the Blue Door in Blue Prince
The Blue Door is located at the end of a tunnel in the Grounds. To find it, head outside the manor and go down the steps into a dark tunnel filled with boxes and containers. You’ll need to use lab experiments to clear the crates blocking your way. Once the crates are removed, you’ll encounter a series of obstacles that must be overcome to reach the door.
To reach the Blue Door in Blue Prince, you’ll need to clear the following obstacles:
- The Basement Key: First, go to the Antechamber to retrieve the Basement Key. Once you unlock the door here, it will remain permanently open.
- Breakable Wall: Bring a Power Hammer to destroy the breakable wall. This section will stay destroyed permanently.
- Red Fusebox: Power up the Red Doors by activating the Boiler Room. This step must be repeated every time you want to pass through this section.
- Fake Wall: Light the candles to part the fake wall. This passage will remain open permanently.
- Microchips: Collect all three Microchips and place them in the pedestal. These Microchips reset to Blackbridge Grotto after each day or run, so you’ll need to retrieve them again if you revisit the area.
Once all these obstacles are cleared, you’ll find the ornate Blue Door with a holly symbol. However, unlocking it permanently requires additional steps.
The Throne of the Blue Prince
To permanently open the Blue Door in Blue Prince, you must reclaim the Throne Room and transform it into the Throne of the Blue Prince. This requires three specific items: the Crown of the Blueprints, the Royal Scepter (blue), and the Cursed Effigy. All three items must be in your inventory during a single day or run.
Once you have these items, draft the Throne Room and enter it. This triggers a cutscene and rewards you with an “ascended blueprint,” which upgrades the Throne Room into the Throne of the Blue Prince. This new version of the Throne Room comes with a unique perk: it permanently unseals all Blue Doors after you draft eight consecutive blue rooms.
Drafting Eight Blue Rooms
To draft eight consecutive blue rooms, you’ll need to plan carefully. Start by placing rooms with connectors, such as Hallways, Cloisters, or Chapels, to create pathways. Once the Throne of the Blue Prince is placed, a tally will appear on your screen, tracking your progress.
To increase the chances of blue rooms appearing as drafting options, use the following buffs:
- Royal Scepter (blue): Select the blue color when using the scepter.
- Banner of the King: Complete the Chess Puzzle and choose the King power, which allows you to select the blue color.
You can also use tools like the Chamber of Mirrors to duplicate existing rooms or Ivory Dice to reroll room options. Once you’ve drafted eight blue rooms, a notification will appear, confirming that the Blue Door has been unsealed.
What’s Behind the Blue Door in Blue Prince?
After unlocking the Blue Door in Blue Prince, you’ll need to revisit the area. Keep in mind that some obstacles, like the Red Door fusebox and the Microchips, will need to be addressed again.
Behind the Blue Door, you’ll find a small room containing three chests, similar to the Parlor Puzzle. The chests are labeled as follows:
- Blue Box: “You have reached the end of your journey.”
- Black Box: “There is no end to this journey.”
- White Box: “There are two true boxes in this room.”
By default, you’ll have one Wind-up Key to open a chest. If you’ve upgraded the Parlor Room, you may have additional keys. Here’s what each chest contains:
- The Blue Box contains a book you can read.
- The White Box is empty.
- The Black Box triggers a cutscene.
And that’s all you need to know about the Blue Door in Blue Prince. Opening the Blue Door is a challenging but rewarding task that requires careful planning and persistence. For more Blue Prince-related content, stay tuned to RetroNoob.
