About Guessarium

Pick any historical event and hold it in your head. The Guessarium asks you questions you can answer with one of five chips, and with each answer it narrows the field. Most of the time it lands on the right event in under fifteen questions. Sometimes it doesn't, and that's the more interesting outcome, because a miss tells us something a hit doesn't.

There's a second way to play. In Reverse, the game holds the secret and you do the interrogating. That's what powers the Daily Enigma and the classroom mode, where a whole room asks questions together.

Guessarium is built and run by Guessarium LLC, an Ohio company. It's a small operation. The event write-ups are produced through a review pipeline described on the editorial policy page, and reviewed by the Guessarium editorial team before publication.

There are no accounts. You don't sign up, and there's nothing to log into. Your streak lives in your own browser, not on a server.

Classroom mode goes further and is anonymous by design, permanently. No student names, no logins, no per-student tracking, ever. A teacher generates a short room code that expires the same day, and the code identifies a room, never a person. The full detail is on the privacy page.

No. The Events Hall is the first hall and the only one open. Three more are drawn on the door and none of them are playable yet. When something is coming rather than built, you'll see it labelled that way. We'd rather say "not yet" than let you click into an empty room.