AI Game Cards

Guessing games & 20 questions for ChatGPT & Claude

Updated

20 questions and a hidden-country geography game, with every answer written down before your first question. Free, no signup. Each game is a ready-to-play prompt (we call it a game card) that you open in your own AI assistant.

In a guessing game like 20 questions, or finding a hidden country from clues, the answer has to exist before your first question. On these cards it does: every hidden thing, and everything the host will tell you about it, is written into a file before release and a fingerprint of those answers (a SHA-256 hash) is published, and the assistant answers from that file.

New to AI games? Start with this guide: The best games to play with ChatGPT, Claude, and Gemini.

GameWhat it isPlayersLengthRated
Bigger Than a Breadbox: A 20 Questions Game A 20 questions game where the AI's answer is locked before you ask: ten sealed things, fixed answers to common questions, every spent question logged. 1+ 30–60 min All ages
Six Bearings: Geography Guessing Game A geography guessing game: find eight hidden countries from six clues each, and get a sealed distance and direction for every wrong guess. 1+ 20–40 min All ages

These games keep their answers in a sealed file on this site, so play them in a chat that can open links, such as ChatGPT or Claude.

Guessing Games № 033 Bigger Than a Breadbox: A 20 Questions Game 1+ players30–60 min Guessing Games № 034 Six Bearings: Geography Guessing Game 1+ players20–40 min

Can ChatGPT play 20 questions without changing its answer?

In a plain chat there is nothing for the assistant to hold. Ask it to think of something and the thing exists only in the conversation, so each answer is whatever sounds likely and the object is settled only when you guess. A 2026 paper, LLMs Can't Play Hangman (arXiv 2601.06973), proves that a model working only from the visible conversation cannot keep a secret both hidden and fixed. Geography guessing adds a second failure: asked for a distance or a direction, an assistant works it out and can state a wrong one with confidence.

Both cards here settle everything in advance. Bigger Than a Breadbox seals ten well-known things with answers to sixty-seven common questions and a written rule for every other question, and logs every answer that costs you a question along with the code or wording behind it. Six Bearings seals eight countries, six sourced clues for each, and a distance and map direction from every country on its 72-country atlas, so the bearing you get for a wrong guess is read from a table.

Checking the fingerprint at /verify/ when you finish proves the hidden things did not move after release. A host can still misread its own file, so each answer stays on screen with the code or bearing behind it, and the whole file is yours to read afterwards. Both cards are rated for all ages and play at one screen: a family can ask the 20 questions as one team, and a class can play the geography rounds with one person typing.

Questions about guessing games & 20 questions

Can I play 20 questions with ChatGPT where it thinks of something?

Yes, with a card that thinks of it first. Bigger Than a Breadbox holds ten sealed things, and you name each one in as few yes/no questions as you can, twenty at most. The AI answers yes, no, sometimes or partly, and each of those costs a question; a question that cannot be answered that way, or trivia the cards do not cover, costs nothing. If you want the AI to guess what you are thinking of instead, there is nothing for it to hide, so a plain chat plays that way well; the best-games guide has a prompt for it.

Is there a geography game I can play with ChatGPT?

Six Bearings hides eight countries and has six clues for each, hardest first. Each round gives you six steps: a clue costs one and a wrong guess two, and every wrong guess comes back with the distance and map direction from the country you named, so you close in the way you would on a map. It takes 20 to 40 minutes for one player or a class with one person typing, and each finished round's sources are read out. Common English names count, and so do the cities printed on its atlas and a list of common misspellings.

Are they suitable for children and classrooms?

Yes. Both are rated for all ages, neither asks for a name or any personal detail, and every thing in Bigger Than a Breadbox is one a child and a grandparent both know. With younger children a parent or teacher should be at the keyboard, because the game runs inside a general-purpose assistant.

If you like guessing games & 20 questions