Interactive AI whodunits
Can you solve a murder?
A growing library of handcrafted mysteries, each with a real, sealed solution. Explore and interact in natural language: question a living, AI-driven cast, search the scene, and accuse when you are ready.
Plays in your browser · No download · First mystery free
How a mystery works
You are the detective
Open the mystery
Every mystery opens with your role, a dossier, and a place in the story. You are not reading about a detective: you are the detective.
Work the scene
Interrogate suspects who remember, deflect, and slip. Search the rooms, gather evidence, and fill in the map as the night unfolds.
Accuse when ready
Name the culprit, the method, and the motive. The solution was sealed before you began: either you cracked it, or you did not.
Sample play
A few moments in a mystery
Every mystery works like this: type what you would say or do in plain language, and the mystery answers, whether you inspect a clue, question a suspect, or press for the truth.
The storm hasn’t let up. A crystal vase lies shattered across the marble, and the grandfather clock has stopped dead at eleven. Merrow, the butler, hovers by the door, and Mr. Thorne stands apart at the window.
The shards scatter outward, struck from above, not simply knocked over. A black thread is caught among them, and a wet boot-print leads toward the library.
A tall case clock stands against the far wall. The pendulum hangs motionless behind the glass, and the hands have stopped at eleven.
You write in plain language. The mystery answers.
The detective's toolkit
Everything you notice, kept close
The dossier
Every mystery opens with what your detective already knows — who you are, why you were called, and who is who. Reread it any time.
The sketch map
Your own floor plan, drawn as you go. Rooms you have only heard of stay faint pencil until you see them yourself.
The cast
Portraits and front matter on everyone you meet — and a face for whoever is in the room with you right now.
Evidence & notebook
What you carry, and a private scratchpad the game never reads. Theorize freely — your suspicions stay yours.
Why MysteryTrove
A trove of real mysteries
Sealed solutions
Every mystery is authored by hand with one fixed truth. The AI performs the world; it never invents the ending. Fair play, always.
A cast that talks back
Ask anything, in your own words. Suspects hold grudges, keep secrets, and crack under the right pressure.
No two nights alike
The story reacts to you. Scenes, conversations, and trouble unfold differently every time you play.
A detective's toolkit
Dossier, fog-of-war map, evidence in hand, and a private notebook. Everything you notice, kept close.
Questions
Fair to ask
Is the AI making the mystery up as it goes?
No. Every mystery is written by hand with one sealed solution before you ever play. The AI performs the world and its characters — it never changes the truth, never invents the ending, and never lets a secret slip early.
Do I need to download or install anything?
Nothing at all. Every mystery plays right in your browser, and your investigation is saved as you go.
Can I play on my phone?
Yes. The whole investigation — questioning, searching, the map, your notes — works on any screen.
Do I need an account?
Yes — a free account, made in seconds with your email or Google. It saves your investigation and keeps your Gallery with you across devices. The first mystery is free to play, start to finish; a subscription is only needed for the rest of the Gallery.
What does it cost?
Your first mystery is free, start to finish. A membership unlocks the full gallery, harder cases, and invitation-only investigations.
Can you solve a murder?
Your first mystery is free. Memberships unlock the full gallery, harder cases, and invitation-only investigations.