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Heartworm – solve the watermill piano puzzle

Find the Watermill Key on the dock below the first bridge. The nearby room has a save point. Go past the Devil’s Den sign and cross the parking lot to the mill.

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Covers the documented chapters, puzzles and routes listed below. The schematic shows orientation and prerequisites. Coverage varies by game version.

Watermill piano puzzle

  1. Find the Watermill Key on the dock below the first bridge. The nearby room has a save point. Go past the Devil’s Den sign and cross the parking lot to the mill.
  2. Open the Watermill House. The poem on the table encodes the notes at the starts of its lines. Play C → D → D♯/E♭ → G → F → D → D♯/E♭ → F. D♯/E♭ is the black key between D and E.
  3. Enter the new opening behind the waterfall. Photograph the possum, use the switch at the ladder and climb down to take the Bolt Cutters. Photograph the possum inside the mill before leaving.

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