The Marrow Lake Patient
Six alibis. One timesheet. One body holding the knife.
▶ Play The Marrow Lake Patient
Interview six alters sharing one body and the patient advocate who shouldn't exist: solve the relay-murder arithmetic, the cottage's two impossible seals, and the identity of the quiet man in the corner — then name what the house's seventh voice plans for your last session, before the door opens.
The setting
Two winters after a cold-case report went unbelieved, its author vanished on the mountain and his escort came down in pieces. The only witness is a nameless psychiatric patient who is never quite one person — six alters, each wearing a dead child's name. You are the psychiatrist sent to find out why.
Frequently asked questions
Players?
Solo. You interview six AI-played alters and one advocate in a psychiatric session.
Duration?
About 150 minutes.
Difficulty?
Expert — a six-way alibi that is one relay, two impossible seals, and a hidden seventh voice you must outname before time runs out.
Ready to investigate?
Step into the case, question every suspect, and see if you can name the killer.
▶ Play The Marrow Lake PatientDetective guides
Sharpen your skills before you start.
More mysteries to solve
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The Nullifier
The body didn't disappear — it was erased.
Fantasy of Causes
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The Vigil
Six lamps went dark — one of them was a lie.
The Crimson Rite
Who died on the altar was never who was drawn.
Eight Coffins
One trail up, none down — and the flowers grew back by dawn.
The Perfect Witness
The evidence that never lies was written by hand.
The House That Lies
The gallery is level. The marble still rolls north.
Magic Square Manor
The floors never turned. The numbers did.
The Fourth Suspect
She died a day after everyone says she did.
The Chapel of St. Michael
The chimney has smoked for fifteen winters. Nobody lives there.
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The sky has two moons, and they are watching one of you.
Choir of Plenty
Ten stones, ten doors, nine nights — and two of the stones are lies.
The Warren
The door opened at 4:00 a.m. The body was found at 2:00.
The Fox Mask
Count the sons.
The Seventh Guest
The dead man wore a mask. So did one of the living.
The Rainbow Country
The duel lasted eleven minutes. The chime rang ninety seconds late.