Indicia: Detective Sudoku

ONE STOLEN JEWEL. A MANSION FULL OF SUSPECTS. A SINGLE CULPRIT.

Indicia is a game of pure logic deduction: place every suspect in the right cell using the clues on their alibi cards, and work out who was left alone with the jewel. No luck, no guessing — every case has exactly one solution, and you get there by reasoning.

HOW TO PLAY
• Every row and every column holds exactly one suspect, like a sudoku.
• Each suspect carries a card with their alibi: "was next to a plant", "in the Library", "alone in their room"...
• Cross-reference the clues, cross out the impossible cells and close the case: the one left alone with the jewel is the thief.

EVERYTHING IS DEDUCIBLE, NOTHING IS GUESSWORK
• Every level is verified: a single solution, reachable through logic alone.
• Stuck? Hints walk you through the full chain of reasoning step by step: what to mark, what to cross out, and why.
• Built-in tutorial so you learn as you play.

PLENTY TO SOLVE
• Over 850 cases across 8 worlds, from 6×6 boards to start with all the way up to 20×20 at extreme difficulty.
• Daily case: a fresh mystery every day, with a streak to keep alive and an archive of past cases.
• Global leaderboards, achievements and detective stats for every case you close.

MADE FOR PUZZLE SOLVERS
If you like sudoku, logic grid puzzles, nonograms, brain teasers or a good detective mystery, Indicia is your next case. Nothing is random and nothing is hidden: the answer is already on the board, waiting for you to read it.

PREMIUM (OPTIONAL)
• Unlimited cases, completely ad-free.
• Offline mode: download whole difficulties and solve with no connection.
• The full daily case archive, plus cloud saves so you can pick a case up on any device.

AN ART DÉCO WORLD
Mansions, a 1920s gala, hand-drawn suspect portraits and the look of a real detective's case file. The atmosphere of a noir novel, the mechanics of a Japanese logic puzzle.

100% wits. Zero luck. Can you catch the thief?

Play in your browser too: https://indiciagame.com