Terms of Use & Prize Rules

Last updated: 26 August 2026

By playing 52! (factorial52.com) you agree to these terms. If you do not agree, please do not use the game.

1. The game

52! is a free game of chance and observation. Two decks are shuffled and turned over card by card. Nothing is for sale: there is no purchase, no subscription, no in-game currency, and no way to pay for anything at all — neither to play, nor to play more, nor to improve your odds.

2. Your account

• An anonymous account is created automatically so your plays can be recorded. You may also link a Google account.
• Keep your access token to yourself. Anyone with access to your browser can play as you.
• Choose a public name that is not offensive, misleading, or impersonating someone else. We may change or remove names that break this.
• One person, one account. Creating multiple accounts to gain an advantage — particularly in a prize promotion — is not allowed.

3. Fair play

The shuffle happens on our server and is committed before you play, so results cannot be altered afterwards. You agree not to:

• use bots, scripts or automated tools to play — other than features built into the game itself, such as an auto-play mode, which are allowed and are not considered automation;
• tamper with the game, the network traffic, or attempt to reverse or forge results;
• attack, overload or probe the service, or bypass rate limits and anti-bot checks.

We may suspend or delete accounts, and void scores, that break these rules. A round in which all 52 cards are guessed correctly is astronomically improbable and will always be reviewed manually before it counts.

4. Prize promotions

From time to time we may run a promotion with a real prize. When one is running, its prize, period and qualifying criteria are shown in the game. The following rules apply to all of them.

• Free to enter. No purchase or payment of any kind is required or possible. Paying does not exist on this site, so it cannot improve your chances.
• You must be signed in with Google to compete. Plays made without signing in still count for statistics and leaderboards, but do not count towards a prize — without a verified email we would have no way to contact a winner.
• Who can enter. You must be at least 18 years old. Employees of the operator and their close family may not enter.
• How the winner is determined. The best score of the promotion’s metric within its period, among entrants meeting the minimum. Ties are broken in favour of whoever reached that score first. Only scores recorded by our server count.
• Contact and claim. We contact the winner at the email address of their linked Google account. If the winner does not reply within 14 days, or cannot accept the prize, we may award it to the next eligible entrant.
• The prize is what is described in the game. It cannot be exchanged for money and cannot be transferred. Any taxes or charges arising from receiving it are the winner’s responsibility.
• Disqualification. We may exclude entries obtained through multiple accounts, automation or any breach of section 3.
• Cancellation. If a promotion cannot be run fairly — for example due to technical failure or manipulation — we may amend or cancel it. We will say so in the game.

By taking part you agree that your public username and score may be shown on the prize standings. Your email is never shown publicly.

5. Availability

The game is provided “as is” and free of charge. We do not promise it will always be available or error-free, and we may change or discontinue it. We are not liable for indirect or incidental losses. Nothing here limits liability that cannot be limited by law, including for death, personal injury, or fraud.

6. Advertising

There are no ads today. If we add them, they will be marked as advertising and will not change the game’s odds or the outcome of any promotion. See the Privacy Policy for how consent will be handled.

7. Intellectual property

The 52! name, design and code belong to the operator. The playing card artwork is the English pattern deck by Dmitry Fomin, released into the public domain (CC0).

8. Law

These terms are governed by Portuguese law, without affecting the consumer protection rights of your country of residence.

9. Changes

We may update these terms; the date above will change. Continuing to play after an update means you accept it. Rules of a promotion already running will not be changed to your disadvantage.