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 ...

Activate all four Blue Flames in Blue Prince, solve related puzzles, and unlock a secret shortcut in Mount Holly Manor for your Underground adventure.

Outside of the Manor in Blue Prince, there are four blue flames that can be lit, and here is how you do it.