Stuck on a piano puzzle in Mouse P.I. for Hire? There are two piano puzzles in Mouse P.I. for Hire, each requiring a specific sequence of notes to unlock hidden paths or collectibles. This guide covers every piano puzzle solution, where to find them, and what you get for solving them.
The Curdsville Nuthouse piano uses C-A-G-E. The Quagmire piano uses A-C-E-G.
Mouse P.I. for Hire Walkthrough: All Missions, Side Jobs & Collectibles
Find every mission, side job, and collectible in Mouse: P.I. for Hire with this walkthrough, including puzzle solutions and 100% completion tips.
How Piano Puzzles Work in Mouse P.I. for Hire
Piano puzzles in Mouse P.I. for Hire follow a consistent pattern: the correct note sequence is always written on a note in the same area.
Because of this, these puzzles are less about guesswork and more about careful exploration. If you find a piano without the clue, take a moment to search the surrounding area before trying to guess the sequence.
All Piano Puzzle Solutions
|
Puzzle |
Mission |
Sequence |
Required for 100%? |
|---|---|---|---|
|
Curdsville Nuthouse Piano |
One Flew |
C-A-G-E |
Yes |
|
Quagmire Piano |
Swamp Oddity |
A-C-E-G |
Yes |
Curdsville Nuthouse Piano Puzzle (One Flew)
There is a piano puzzle in the Curdsville Nuthouse during the One Flew mission.
Solution: C-A-G-E
After obtaining the Jar-Head weapon, follow your Detective's Brush until you run into Millie. Cross the bridge ahead and look left to find the piano.
Play the sequence C-A-G-E on the piano to lower a bridge and access a path that leads to Gloria. This is a requirement for completing the Behind the Nuts side job, which involves snapping a photo of that NPC.
This is the only piano puzzle tied directly to a side job objective. For more information about the One Flew piano puzzle, see our full Behind the Nuts walkthrough.
The Quagmire Piano Puzzle (Swamp Oddity)
There is a piano in the Strange Cabin's music room during the Swamp Oddity mission.
Solution: A-C-E-G
After entering the music room, play A-C-E-G on the piano and go through the door behind you. Pass through the closet that opens to access a hidden room with a Baseball Card.
Check our complete Swamp Oddity mission walkthrough to learn more about the Swamp Oddity piano puzzle.
Are Piano Puzzles Required for 100% Completion?
Yes, some piano puzzles are required for 100% completion. The Curdsville Nuthouse piano puzzle must be solved to complete the Behind the Nuts side job, which is a requirement for an achievement.
The Swamp Oddity piano puzzle leads to a Baseball Card required for full completion, though you can also buy it from the Soup to Nuts or a Roadhouse if you don't pick it up here.
Why Piano Puzzle Solutions Are Easy to Miss
Piano puzzles are easy to miss because both the instruments and their clues are placed off the main path. The notes that reveal the correct sequences are small and easy to overlook, and the pianos themselves are tucked into optional areas.
FAQ
What are the piano puzzle solutions in Mouse P.I. for Hire?
The known solutions are C-A-G-E (Curdsville Nuthouse) and A-C-E-G (The Quagmire).
Where is the piano in the Curdsville Nuthouse?
Past Millie after getting the Jar-Head weapon.
Where is the piano in the Quagmire?
In the Strange Cabin's music room.
Do piano puzzles unlock collectibles?
Yes. The Swamp Oddity puzzle leads to a Baseball Card needed for 100% completion.
Can you miss piano puzzles?
Yes. Both puzzles are easy to miss if you don’t interact with the piano or find the clues that reveal the correct sequence.
- Released
- April 16, 2026
- Developer(s)
- Fumi Games
- Publisher(s)
- PlaySide
- Engine
- Unity
- Number of Players
- Single-player
