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The way into Room 46 isn’t the only secret to discover inBlue Prince. There arequite a few puzzlesthat don’t necessarily have anything to do with your main objective. You are rewarded for solving these puzzles, so taking time to explore is always worth the effort in the end. Even when you are outside of the Manor, there is plenty for you to discover. One thing you may notice early on is a set of stairs outside the front door that lead down to a little balcony with pipes connected to it. Blue flames can appear in this spot, and here is how you can activate them.
Spoilers below; proceed with caution.
How to Activate All Blue Flames in Blue Prince
In order to activate all four blue flames, you will need to find and activate four different gas switches. None of them are inside the manor, but you will need to explore Mount Holly Manor to reach them. Theswitches to activate the blue flames are in the Apple Orchard, Gemstone Cavern, the Hovel, and the Schoolhouse.
Any blue flames you have activated stay lit, even when you start a new day.
Apple Orchard
The Apple Orchard is outside near your tent, but to enter it you need to know thecode to the combination lockon the gate. You can find the code for the lock by using the Magnifying Glass on the picture in the Dark Room while the lights are on. The lights can be turned on by flipping the switch in the Utility Closet. Look for the date on the tree, which is 11/28. Put 1128 into the lock and then go into the Apple Orchard. On the left side of the orchard, you will see a pipe with a switch on it.
Gemstone Cavern
Outside of the manor, near your camp and the Apple Orchard, there is a mechanical door that you’re able to’t open. Inside is the Gemstone Cavern, and the second switch can be found in there. To get into the Gemstone Cavern, find the Utility Closet. You will need to press the buttons below the V.A.C. Indicator label until the colors are in the following order from left to right: off, blue, green, white, red, purple. This causes the wall to lift up and reveal a large lever. Pulling this lever opens the Gemstone Cavern. The switch will be immediately on your right inside the Gemstone Cavern.
Hovel
Both the third and fourth flames can only be found in rooms that are exclusively draftable in the Outer Room slot, which includes the Hovel and Schoolyard. In order to reach the Outer Room slot, there are two rooms you must find in the manor. The first is the Utility Closet, and the second one is the Garage. On the circuit breaker in the Utility Closet, flip the switch to “On” for the Garage. This allows you to open the garage door and go outside.
Follow the path outside to reach the door for the Outer Room. Hovel is one of the rooms you can potentially draft. Inside the Hovel, the switch for the third blue flame is on the wall next to the stove.
While you are outside, make sure to approachthe west gate and unlock it. Doing so will result in the gate being unlocked even when you call it a day. This way, you can go right to the Outer Room without having to find the Garage.
Schoolhouse
Just like the Hovel, the Schoolhouse is one of the rooms that can be drafted in the Outer Room. If either isn’t available, you can try again on a future attempt. Once the Schoolhouse is available, the fourth switch will be on the heater in the middle of the room.
What Happens When You Activate All Four Blue Flames in Blue Prince?
With all four blue flames activated, an elevator will appear. Just like everything else outside the manor, this elevator doesn’t reset. This elevator takes you down to a new area where you can find the Chess puzzle.