In Blue Prince, one of the key permanent upgrades you can unlock is access to the Basement by lighting the four blue braziers located outside the house. Unlike many other paths in the game, this one does not reset, making it a crucial objective for progression.
However, lighting these braziers isn’t as simple as flipping a switch—you’ll need to locate and activate four gasline valves scattered across different areas of the estate. This guide will walk you through exactly where to find each valve and how to ensure all braziers stay lit for good.
Before you can light the braziers, you need to find them. Here’s how:
Exit the Entrance Hall and head outside to the Grounds.
Move left past the Fountain and go down the stairs.
At the bottom, you’ll see all four blue braziers lined up on a platform.
Each brazier corresponds to a gasline valve in a different area of the estate. Once you turn a valve, its linked brazier will automatically ignite.
The real challenge lies in tracking down the four valves. They are located in:
The Orchard
The Gemstone Cavern
The Hovel
The Schoolhouse
Below, we’ll break down exactly how to reach each one.
Prerequisite: You must first retrieve the Orchard gate code from the Darkroom.
Once inside the Orchard, the gasline valve is immediately to your left upon entering.
Prerequisite: Gain access to the Gemstone Cavern via the Utility Closet.
The valve is just inside the entrance, on the right-hand side.
These two valves are trickier to access because they require constructing special outdoor rooms. Here’s how to do it:
Go through the Garage and open the West Gate to unlock the West Path.
Use the Outer Room door to draft new rooms.
Important: You can only draft one Outer Room per day, so obtaining both the Hovel and Schoolhouse may take multiple in-game days.
Once the Hovel is constructed, enter and look for the valve to the right of the fireplace or stove.
After drafting the Schoolhouse, the valve is located on the back side of the heater in the center of the room.
Once all four braziers are lit, an elevator will appear on the platform where they’re located. This provides permanent access to the Basement—but only if you’ve already obtained the Basement Key.
Plan Ahead: Since you can only draft one Outer Room per day, prioritize which valve you need first.
Check Your Map: If you’re unsure where a location is, review your in-game map for reference.
Permanent Progress: Unlike other paths, the braziers stay lit forever, so this is a one-time task.
Lighting the four blue braziers is a key step in unlocking deeper progression in Blue Prince. By following this guide, you’ll efficiently locate all gasline valves and secure permanent Basement access, saving you time in future playthroughs.
Now, go forth—ignite those braziers and uncover the secrets hidden below!