The Clock Tower puzzle in Blue Prince is one of the game’s most intricate challenges, combining time-based mechanics, logical deduction, and hidden clues. Unlike some misleading guides, the true solution doesn’t just revolve around manipulating a single clock face or relying solely on audio cues—it’s about setting eight grandfather clocks in a hidden chamber to the right times.
This guide provides the confirmed solution, including how to access the hidden room, interpret the clock notes, and unlock the Sanctum Key.
🔓 How to Access the Clock Tower
The Clock Tower doesn’t always appear in your estate draft. It is randomly generated and only shows up in the Drafting Studio when selected.
To increase your chances of getting the Clock Tower puzzle:
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Look for tall, spire-like blueprints when drafting rooms. These blueprints often hint at the Clock Tower’s presence.
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The Clock Tower puzzle appears more frequently after unlocking mid-to-late-game areas like the Parlor, Vault Room, or Throne Room.
Once you’ve drafted the room, you’ll gain access to the Clock Tower puzzle. But don’t forget—timing is crucial!
⏳ Timing is Critical
The central clock in the Clock Tower will always be stuck at 1:30 PM, but the side clocks show real in-game time.
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You must be inside the Clock Tower before 1:30 PM in-game. Keep in mind that in-game time moves quickly (roughly 5 minutes real-world = 1 hour in-game), so you'll need to keep an eye on the clock and make sure you're in the room at the right moment.
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If you miss the time window, you’ll have to wait for the next in-game day to try again.
🕰️ The Hidden Chamber Puzzle – True Solution
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Once inside the Clock Tower at 1:30 PM, a hidden passage opens, revealing eight grandfather clocks with color-coded notes:
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🔵 Blue notes = TRUE: These are the valid clues.
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🔴 Red notes = FALSE: These are misleading and not to be followed, although some handwritten red notes may be true (use a magnifying glass to check for accuracy).
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🧠 Key Clues to Follow
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As you inspect the eight clocks and their notes, here are the important clues to help you set the correct times:
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No times containing 1, 2, 3, or 4: This eliminates any clocks set between 10:00 and 4:59.
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Five clocks must show exact hours (X:00): These clocks must be set on the hour (e.g., 5:00, 6:00, etc.).
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One clock must have neighbors that both display a "7": One of the clocks must have times that are adjacent to each other and contain the number 7 (e.g., 7:00).
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One clock’s time must be the reverse of another’s: Look for two clocks where the time is a mirror image of another (e.g., 5:08 and 8:05).
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Times must be in ascending order (left to right): The times on the clocks should follow a logical sequence, from earliest to latest (left to right).
Ignoring Bell Delays: There's a delay after ringing the bell—wait a few seconds before assuming you got it wrong.
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Misreading Roman Numerals: Many players confuse IV with VI, especially on cracked mural faces.
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Resetting Too Fast: Wait for the symbols or glow to confirm before spinning the hands again.
✅ Confirmed Clock Settings (Left to Right)
The correct solution to the puzzle is as follows, in left-to-right order:
| Clock | Time |
|---|---|
| 1 | 5:00 |
| 2 | 5:08 |
| 3 | 5:57 |
| 4 | 6:00 |
| 5 | 7:00 |
| 6 | 8:00 |
| 7 | 8:05 |
| 8 | 9:00 |
Why This Works:
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Five on-the-hour times: 5:00, 6:00, 7:00, 8:00, and 9:00 are all on the hour.
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Neighbors with "7": Clock 5 (7:00) is next to Clock 4 (6:00) and Clock 6 (8:00), but the correct logic is that the neighbors should contain the number 7. This clue might be a little more abstract in execution.
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Reversed times: 5:08 (Clock 2) and 8:05 (Clock 7) are mirrored.
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No forbidden digits: All the times are between 5:00 and 9:59, and no times contain the forbidden digits 1, 2, 3, or 4..
🎁 Rewards
When you solve the Clock Tower puzzle, you’ll receive a Sanctum Key: This is a crucial item for further progression in the game.
💬 Community Insights & Theories
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r/BluePrince players share theories about alternate time sequences: 6:30, 3:45, and mirrored times like 11:10.
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Steam Community threads discuss using the Throne Room bell pattern as a clue.
❌ Common Mistakes to Avoid
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Ignoring the time window: You must enter the Clock Tower before 1:30 PM in the game. If you’re too late, the puzzle will reset, and you’ll need to wait for the next in-game day.
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Misreading the notes: Be careful with red notes—while most are false, some handwritten red notes might contain hidden truths.
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Leaving the chamber early: If you exit the room before solving the puzzle, the wall will close, and you’ll have to try again in another run.
🔍 Advanced Tips
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Use headphones: Many players report that using headphones makes it easier to detect subtle audio cues when the clocks are set correctly. You’ll also be able to detect subtle changes in the environment.
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Check shadows: Some stained-glass windows cast shifting shadows that hint at valid times. Pay attention to these, especially when combined with mural timings.
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If stuck, reset: If you find yourself struggling, consider resetting and waiting for the next in-game day. The puzzle may reset, giving you another shot.
✅ Final Thoughts
The Clock Tower puzzle in Blue Prince is one of the game’s most rewarding challenges. It requires you to pay close attention to time-based mechanics, logical deduction, and the hidden clues scattered throughout the tower. Successfully solving the puzzle will grant you key items and unlock deeper lore about the game's world.
Want to explore more puzzles? Check out:
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