<ul><li>Learn how to solve the piano puzzle in the CoD Black Ops 6 Campaign found at the Rook Safehouse to unlock the secret basement room.</li><li>To solve the piano puzzle, examine the piano and press the keys in the correct order: Mn, Pe, CN, Ao, Pe.</li><li>Use the blacklight to find hidden symbols on the walls which reveal the code to open the secret door.</li><li>The order of the symbols is: Mn, Pe, CN, Ao, Pe. Once input correctly, the secret door will open, leading to the basement with the next set of puzzles.</li></ul>

CoD Black Ops 6 Campaign: How To Complete Piano Puzzle

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