Mouse P.I. for Hire Door Codes: All Codes & Puzzle Solutions

Need help finding all the door codes in Mouse P.I. for Hire? This page lists every code we know, covering both the standard codes and solutions to the more complex, multi-step puzzles.

The following sections provide the solutions and explain how to apply them. For complete instructions, specific puzzle locations, and a list of rewards, please refer to the more detailed guides linked within the text.

To open the Curdsville Nuthouse, use the code 451. The Shrewd Shrews door works with several 4-digit codes, such as 0316, 0451, 1224, 1234, 1920, 2019, 2137, and 3125.

How Door Codes Work in Mouse P.I. for Hire

There are two types of door code puzzles in Mouse P.I. for Hire: fixed-code and multi-code puzzles.

Fixed-code puzzles (like the Curdsville Nuthouse door) always use the same combination and unlock a single room.
Multi-code puzzles (like the Shrewd Shrews door) accept multiple combinations, each revealing a different variation of the room.

No matter the puzzle, you solve door code challenges by using the wall levers to enter a code and then pressing the submit button.

All Mouse P.I. for Hire Door Codes

Door Puzzle	Mission	Code(s)	Type	Required for 100% Completion?
Curdsville Nuthouse Door	One Flew	451	Fixed	No
Shrewd Shrews Door	The Depths	Multiple	Multi-solution	No

Curdsville Nuthouse 3-Digit Door Code (One Flew)

In the One Flew Over the Cuckoo’s Nest mission, you’ll find a door at the Curdsville Nuthouse that requires a 3-digit code to open. The code is always 451. This is the only door in the game that uses the same fixed code every time.

You’ll find this puzzle early in the level. For detailed instructions on finding the code and understanding how to use the levers, check out our guide to the Curdsville Nuthouse door code.

Shrewd Shrews 4-Digit Door Codes (The Depths)

The puzzle in Shrew Village during the Depths mission is different from the Nuthouse door. It has several ways to be solved, and each code you enter alters the room. This makes it unique – it’s the only puzzle in the game meant to be solved more than once.

0316
0451
1224
1234
1920
2019
2137
3125

If you want to try multiple codes, simply leave the room and come back in – this will start the puzzle over, letting you enter a new code.

You can find the precise locations of the puzzles, details about each room, and screenshots of the solutions in our guide to the 4-digit door codes for Shrewd Shrews.

Are Door Codes Required for 100% Completion?

Don’t worry about the door codes – you can finish the game completely without them. The rooms they unlock don’t have anything essential for completing the story, side quests, or earning achievements.

As a player, I’ve found that those little side rooms are packed with useful goodies, interesting story bits, and cool secrets you can mess around with. Don’t worry, you won’t need to find everything to finish the game, but you’ll definitely be missing out on some extra fun stuff if you skip them!

FAQ

What is the Curdsville Nuthouse door code?

The code is 451. For exact lever inputs and the clue location, use the full guide linked above.

What are all the Shrewd Shrews door codes?

The known codes are 0316, 0451, 1224, 1234, 1920, 2019, 2137, and 3125.

Where do you find door codes in Mouse P.I. for Hire?

To open the Curdsville Nuthouse, find the code on a note at the level’s end. The Shrewd Shrews’ door codes are hidden throughout the game – you’ll find them written on notes and scratched into walls, especially in the Depths.

Can you use every code in one playthrough?

Yes. The Shrewd Shrews puzzle resets, allowing you to try multiple codes in one visit.

Are there other door codes in the game?

The main puzzles you’ll face to unlock the code doors are found in the Curdsville Nuthouse and Shrewd Shrews areas. We’ll add any new codes we find to this guide.

2026-04-30 17:16