Case File No. 001 · Case Open
Catch the jewel thief.
A 100% logic deduction game. Read the clues, place every suspect at the scene, and work out who walked off with the gem.
6×6 to 20×20 · 8 difficulty levels · no luck involved
The Method
Pure deduction. No luck.
Indicia is a detective's sudoku: logic leads you to a single possible solution.
01
Read the clues
Every suspect carries a clue. One of them points to the thief.
02
Place every suspect
One person per row and per column, only on valid spots at the scene.
03
Deduce, never guess
Cross-reference the clues with pure logic until only one possibility remains.
04
Catch the thief
It's the one suspect left alone with the jewel in its room.
The Case File
A mystery with substance.
Rooms, suspects, objects and clues — all in service of a single culprit.
100% logical deduction
No luck involved: every case has a unique solution you can reach through pure reasoning.
Hundreds of levels
One case file per difficulty, climbing from 6×6 to 20×20 — rookie to expert.
Catch the thief
Every case hides a jewel thief: work out who did it from rooms, objects and clues.
Daily case & streaks
A fresh case every day. Keep your streak alive and share your result spoiler-free.
Achievements & rankings
Every case earns points: unlock achievements and climb the global leaderboard.
Progressive hints
Stuck? Step-by-step hints that teach you to deduce — without spoiling the case.
Plans
Start free. Take on bigger cases.
Play without paying a thing. When you want the full case file, go premium.
Detective
Free
forever
- 15 cases per day
- Daily case, achievements & rankings
- Progress saved to your account
- With ads (web and mobile app)
Inspector · Premium
US$29,99
per year · save 50%
- Unlimited cases, no daily cap
- Daily case archive (every past case)
- Save and resume any game
- 15 hints per month (they roll over)
- No ads (web and mobile app)
- Play offline in the mobile app
- Progress synced across web + app
Questions
Frequently Asked Questions
What is Indicia?
Indicia is a logic deduction game: you read each suspect's clue, place them on the board, and catch the jewel thief. If you enjoy detective games and sudoku-style logic puzzles, it's for you. 100% wits, zero luck.
Is it free?
Yes. You play with a daily level limit (ad-supported). The premium plan removes the ads and unlocks unlimited levels.
Is there any luck involved?
Never. Every case has a single solution reachable through pure logic. Deduce correctly and you always get there.
How does progression work?
A case file of levels for each difficulty, ramping up gradually. Every case file starts at level 1 and unlocks as you solve.
Do I need an account?
You can start as a guest. Create an account whenever you want to sync your progress and achievements across devices.
Which devices can I play on?
In your browser and in the iOS and Android apps, sharing the same progress and achievements.
What if I get stuck?
Progressive hints show you the next logical step without spoiling the solution. You learn to deduce better.
Also in print
The Casebook
80 printed cases to solve with a pencil, away from the screen. The same ones as the game: guaranteed unique solution, zero luck.
Spanish edition
El Libro de Casos · Volume 1
The same eighty cases, entirely in Spanish.
Paperback · 186 pages · 6 × 9 in
English edition
The Casebook · Volume 1
Eighty high-society scenes of the roaring twenties. In each one, a jewel vanishes.
Paperback · 186 pages · 6 × 9 in
Play anywhere
Take the case with you.
Get the app for iPhone, iPad and Android, or play right now in your browser — your progress, streaks and achievements stay synced across all your devices.
