Case Library · Played in your AI
Murder at Blackwood Manor
A wealthy gentleman is found murdered behind a locked door, and everyone in the manor has something to hide.
Free, always
- Players
- 1 detective
- Play time
- 30–45 minutes
- Difficulty
- Moderate
- Genre
- Locked-room mystery
- Length
- Medium
- Setting
- An English country estate, November 1932
If your AI can’t open links, download the case file, attach it to a new chat, and say: Please run this attached case file exactly as written.
Games are hosted by an AI game master you run in your own assistant.
How to play
- Tap “Copy the case.” It copies a short starter message.
- Open ChatGPT, Claude, or Gemini and start a new chat. The free versions work.
- Paste it and send. Your AI opens the full case file from our site.
- Pemberton takes it from there. Ask questions, examine the evidence, and name the killer when you’re ready.
Get next Friday’s case
A new case every Friday, free for its first week.
The Case
England, 1932. A violent storm has isolated Blackwood Manor, where Sir Edmund Blackwood has been discovered dead inside his locked study. With five suspects, conflicting accounts, and a household full of secrets, Pemberton invites you to take charge of the investigation.
The Suspects
-
Clara Blackwood
The niece
The woman who summoned you to the manor. Deeply concerned about her uncle's death and the family's future.
-
Arthur Vale
The estate solicitor
A respected legal adviser who has managed the Blackwood family's affairs for years.
-
Lady Beatrice Blackwood
The estranged wife
Refined and fiercely private, she knows more about life at the manor than she cares to discuss.
-
Henry Pike
The estate steward
A longtime servant of the Blackwood household, familiar with its routines and inhabitants.
-
Dr. Elise Rowan
The family physician
An accomplished doctor who knows Sir Edmund's medical history and the family's private concerns.
FAQ
How do I play?
Click Copy the case, open ChatGPT, Claude, or Gemini, and paste it into a new conversation. Pemberton will introduce the case and guide you through the investigation.
Do I need a paid AI subscription?
No. The game works with the free versions of ChatGPT, Claude, and Gemini, subject to their usage limits.
Do I need to know special commands?
No. Just talk naturally. Question suspects, search rooms, examine objects, and explain your theories in your own words.
Can I stop and continue later?
Yes. Return to the same AI conversation to continue. Starting a new conversation starts a new game.