Megammon · legal
Terms of use
Last updated: October 22, 2026
Welcome to Megammon. These general terms of use explain what you can expect from the service and what we expect from you. They begin with the legal notice.
This English version is provided for convenience. In case of any discrepancy, the French version prevails.
1. Legal notice
Megammon (megammon.com) is published by Tellter SAS, a French simplified joint-stock company with a single shareholder (société par actions simplifiée à associé unique), with a share capital of €5,000, registered with the Paris Trade and Companies Register (RCS) under number 899 727 606, whose registered office is located at 9 rue des Colonnes, 75002 Paris, France.
- Director of publication: Nathan Lourenço, President.
- Contact: contact@megammon.com.
The site is hosted by:
- Vercel Inc. (website front end, megammon.com), 440 N Barranca Avenue #4133, Covina, CA 91723, United States, vercel.com.
- Railway Corporation (game and analysis server and database, api.megammon.com), 548 Market St PMB 68956, San Francisco, CA 94104, United States, railway.com.
2. Purpose and acceptance
These terms set out the rules for using Megammon. Creating an account, signing in or playing as a guest constitutes acceptance of these terms and of the privacy policy. If you do not accept them, do not use the service.
3. The service
Megammon is a free online backgammon service that includes:
- games against the Megammon bot, with friends, and online in ranked matches, with an Elo rating;
- the Megammon Engine, which analyzes the matches you play or import, and a practice mode that assesses your moves during the game;
- exercises drawn from your mistakes, and explanations written by an artificial intelligence.
We do our best to keep the service available and working properly, but we cannot guarantee it: the service may be interrupted for maintenance or change, and some features may be modified or withdrawn.
4. Account and access
- The service is open to people aged 15 or over. A younger person may use it only with the consent of a holder of parental responsibility.
- You can play against the bot without an account (as a guest). An account is required to play online or with friends, and to use the Megammon Engine.
- You create your account with an email address and a password, or with your Google account. The information you provide must be accurate. You are responsible for your password and for everything done from your account; report to us any use you have not authorized.
- An account is personal: do not share it, and do not create more than one for yourself.
5. Code of conduct and fair play
By using Megammon, you agree not to:
- get help during a ranked game or a game with friends from analysis software, a bot or another person (this does not apply to the practice mode, which Megammon itself provides);
- distort the rankings: multiple accounts, fixed games, repeated deliberate resignations or disconnections to manipulate Elo ratings;
- choose a username or picture that is abusive, hateful or sexual in nature, that infringes the rights of others, or that impersonates another person;
- harass or insult other players;
- access the service by automated means (bots, data scraping), or attempt to circumvent its security, overload it or access other users' data;
- import unlawful files, or files you do not have the right to use.
6. Rankings and Elo
Elo ratings are calculated by Megammon using its own method, purely as part of the game: they have no official or commercial value. In the event of cheating, error or abuse, we may cancel results, and correct or reset an Elo rating.
7. Your content
You remain the owner of what you contribute: username, profile picture, imported match files, messages sent through “Feedback”. You authorize us to store and use them only to the extent necessary for the service: displaying your username, picture and country to other players, analyzing your files, handling your messages. This authorization ends when you delete the content or your account.
The match files you import often contain your opponents' usernames on other platforms: import only matches you took part in or that you have the right to use. We may remove any content that breaches these terms.
8. Analyses and explanations
Analyses, practice-mode verdicts, levels and explanations are computed automatically, by a backgammon engine and, for explanations, by an artificial intelligence whose answers are checked by Megammon. They are provided for information only, to help you train: they may contain approximations or errors, and the full analysis of a match may correct a verdict given during the game.
9. Intellectual property
The Megammon name and logo, the interface, and the site's texts and visuals belong to Tellter SAS. You may not reproduce or reuse them without our consent, other than in the normal use of the service.
10. Account suspension and deletion
You may stop using Megammon at any time and delete your account yourself from My profile, or by writing to us.
In the event of a breach of these terms, we may, depending on its seriousness, issue a warning, or suspend or delete an account, informing you of it except in an emergency (security, legal obligation).
11. Liability
Megammon is provided free of charge, as is. To the extent permitted by law, Tellter SAS is not liable for interruptions of the service, loss of games or data, or indirect damage related to its use. Nothing in these terms limits the rights you have under the law as a consumer.
12. Personal data
The processing of your data is described in the privacy policy.
13. Changes to these terms
We may change these terms, for example when the service evolves. The date of the last update appears at the top of the page; in the event of a significant change, we will notify you on the site or by email. Continuing to use Megammon after the new terms come into force constitutes acceptance of them.
14. Governing law and disputes
These terms are governed by French law. In the event of a disagreement, please first write to us at contact@megammon.com to seek an amicable solution. Failing that, the dispute will be brought before the competent courts in accordance with the ordinary rules of jurisdiction.
Any questions: contact@megammon.com. See also: privacy policy.