Murder sudoku · Logic puzzle
Solve murders with pure logic.
Place every suspect on the floor plan, one per row and one per column. Read the clues. The killer is whoever was left alone with the victim.
- 56 free cases
- No ads
- Works offline
- 7 languages
Case file 01
Try the first case. Right here.
Harlan Voss was found dead. Three suspects, four clues, one killer. Pick someone up, then tap a square.
The Death of Harlan Voss
Tap a portrait to pick someone up.
The cast
Clues
- 01Mara Quill was in the Garden.
- 02Mara Quill was in an outer corner of the board.
- 03Harlan Voss was in an outer corner of the board.
- 04Brock Vane was in the Study.
One person per row and per column. The killer was alone in a room with the victim.
The grid holds. Who killed Harlan Voss?
It was Ines Dorn.
Alone with Harlan in the Hall. 55 more free cases are waiting in the app.
How it works
Three rules. Endless cases.
- 01
Read the scene
Every case is a floor plan with rooms and furniture, a cast of suspects and one victim.
- 02
Follow the clues
Who sat in the armchair, who could see the staircase, who was in the garden. Every clue is true, and every one is explained.
- 03
Name the killer
One person per row and column. When the grid holds, the killer is the one person alone with the victim.
Inside the app
A whole case file in your pocket.
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Clues light up the scene
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Every rule, explained
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Name the killer
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Case closed
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Your case files
Case files
136 cases. One solution each.
Start free, from a gentle 4×4 tutorial to 12×12 houses. Two themed packs open whole new buildings.
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Free
First Steps
6 tutorial cases that teach every rule
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Free
The First Fifty
50 cases, from 6×6 up to 12×12
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One-time purchase
Blackwater Hall
40 cases in a manor on dark water
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One-time purchase
The Kestrel Hotel
40 cases from the lobby to the laundry
Why Sleuthy
Made like a puzzle book, played like a game.
No ads. Ever.
No banners, no videos, no timers. Just the case.
Fair by design
Every case has exactly one solution, and no step needs a guess.
Tips that point, not spoil
Stuck? The bulb shows who to place next before it gives anything away.
Every clue explained
Tap a clue to see exactly what “beside” or “could see” means.
Offline, no account
Play anywhere. Your progress stays on your phone.
Seven languages
English · Deutsch · Français · Español · Italiano · Português · Nederlands
FAQ
Questions, answered.
What is a murder sudoku?
A logic puzzle with a crime story. As in sudoku, every row and every column holds exactly one person. The clues tell you where everyone stood, and the finished arrangement reveals the killer: the one suspect left alone with the victim.
Is Sleuthy free?
Yes. The tutorial and 50 cases are free, with no ads. Two themed packs of 40 cases each are one-time purchases. There are no subscriptions.
Is Sleuthy related to the Murdoku books?
No. Sleuthy is an independent game by LaneThree. If you enjoy murder sudoku puzzle books, you will feel right at home.
How hard are the cases?
They start with a 4×4 tutorial and grow to 12×12 houses with up to twelve suspects. Every case can be solved by deduction alone.
Which languages does Sleuthy speak?
English · Deutsch · Français · Español · Italiano · Português · Nederlands. The clues, the case titles and the whole app.
Do I need the internet?
No. Sleuthy plays fully offline. Only buying or restoring a pack needs a connection.
Is it suitable for children?
Sleuthy is made for players aged 13 and up. Nothing violent is shown: the crime is only the theme of the puzzle.
The killer is still in the house.
Download Sleuthy and open the first case file.
English · Deutsch · Français · Español · Italiano · Português · Nederlands