The Clockmaker's Heart
About this game
The Clockmaker's Heart is a 3D gear puzzle game about rebuilding a giant brass automaton. The giant stands in a workshop with seven organs to restore, among them the Hand, the Eye, the Voice, the Arm, the Lungs and the Heart. Drag to turn the giant, scroll to move closer, then enter a chamber to repair it.
Each chamber is a pegboard puzzle. You place gears of different sizes so their teeth mesh with a turning drive gear and carry motion to an output, such as the index finger of the Hand. Every chamber has a par number of gears and a three-star rating, plus undo, reset and hint buttons. A detail switch (low, medium, high) lets slower computers keep up with the lighting.
Anthropic engineer Felix Rieseberg made it with Claude Fable 5.2 on launch day, 9 November 2026, as one of three games he published as first drafts with no human feedback. The other two are the sailing game Tidewright and the shooter Saltline.
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