Escape Rooms
Cipherhouse
Locked in a dead cryptographer's house, you break a chain of five ciphers to the door before the candle dies; the exit code was sealed before you began.
Cipherhouse is a free escape room you play inside ChatGPT, Claude, or Gemini. A five-lock cipher escape room whose exit code is sealed before you're locked in. For solo play, about 40–55m a session, it needs no signup — open it in your assistant, or paste one link, and play.
- Players
- 1
- Length
- 40–55m
- Rating
- All ages
- Version
- 1.0.0
Works with ChatGPT · Claude · Gemini. Free, no signup.
Opens your assistant, fetches the game, and starts — the same on your phone or desktop. Playing in Gemini? Tap Copy link to play and paste it in.
No web access, or want it as an installed app?
The game card is the whole prompt — paste it if your assistant can't browse the web. The Skill installs Cipherhouse into Claude on any plan: download it, then Claude → Settings → Capabilities → Skills → Upload.
How to start
- Open your AI. Start a new chat in ChatGPT, Claude, or Gemini. No paid plan required.
- Paste the room card. The card seals the escape code with a SHA-256 hash and locks you in the Cipherhouse.
- Break the chain. Decode five linked locks, each answer the key to the next, before the hour-candle burns out.
- Escape and verify. Speak the final code to open the door, then hash the reveal to confirm the seal held.
Questions
- Can ChatGPT actually run an escape room?
- Yes. Every puzzle and its answer are printed on the card, so the AI checks your input instead of improvising. It plays the locked house and the notes while you do the decoding. Because the answers are fixed, it cannot hand you the exit or move a puzzle when you get close.
- How is the ending kept fair?
- The final escape code is committed with a SHA-256 hash printed on the card before you start. The house cannot change the code mid-game, and you hash the revealed answer afterward to prove it never moved.
- Do I need to be good at ciphers?
- No. The chain uses classic, self-contained puzzles: a shift cipher, a keyword substitution, a book cipher, a number lock, and an acrostic. Each has a three-step hint ladder plus an answer-on-request option, so you never get stuck, and everything you need is printed on the card.
- What happens if I run out of time?
- An hour-candle sets a 60-minute budget, and wrong answers and hints burn it down. If it reaches zero the door stays shut and the run ends trapped, scoring zero. You can save at any point and resume the same room in a new chat.
- Do I need an account or any tools?
- No account beyond the chat app. Paste the room card into ChatGPT, Claude, or Gemini to begin. Verifying the seal uses any SHA-256 tool, including ones built into your operating system.