These Terms of Service ("Terms") govern the use of the private MU Online server operated under the REX MU brand (rexmu.online), including the website, the game client, user accounts, and any purchase made in the shop. By creating an account, installing the client, or using any part of the service, you accept these Terms in full. If you do not agree, you must not use the service.
These Terms are originally drafted in Spanish and are governed by the law of the Argentine Republic (see "Governing Law and Jurisdiction" below). In case of any discrepancy between this version and the English or Portuguese translations available on the site, the Spanish text prevails.
REX MU is a non-profit fan project that operates an unofficial private MU Online server under the trade name "REX MMORPG".
Contact details:
To play, you need to create an account with a username, password and email address. You are responsible for keeping your credentials confidential and for all activity that occurs on your account.
The minimum age to create an account is 13. If you are between 13 and 17 years old, see "Minors and Purchases" below.
You must provide truthful registration information. Accounts created to evade a sanction (ban evasion) are not allowed, nor is selling or transferring accounts outside of any mechanism the service expressly enables.
Users between 13 and 17 years old represent that they have the consent of a parent or legal guardian to use the service and to make any purchase, consistent with Article 684 of the Argentine Civil and Commercial Code, which presumes parental consent for everyday, low-value contracts entered into by minors. This presumption does not automatically cover high-value purchases.
A parent, mother/father or legal guardian may contact us at support@rexmu.online to dispute a purchase made by a minor in their care. We will evaluate each case individually; the availability of this contact channel does not guarantee an automatic refund and does not exempt the minor or their guardian from the general rules in these Terms.
The game includes chat between players and other forms of social interaction. All users are expected to treat other players with respect. The detailed conduct rules, what counts as objectionable content (harassment, hate speech, sexual content, spam, impersonation, cheating, exploiting bugs, trading accounts outside the service, among others) and the moderation process are published in our Code of Conduct.
By using chat or any other social feature of the game, you also accept the Code of Conduct, which is incorporated into these Terms by reference. We reserve the right to review reports of objectionable content or conduct and to take action where appropriate, including warnings, temporary restrictions, mute, kick, or account ban. We do not guarantee a fixed response time for every report, but reports we receive are reviewed and, where appropriate, acted on.
The REX MU shop lets you purchase "RP" (Rex Points, the site's virtual currency) and VIP status with real money, currently through MercadoPago on the website. RP and VIP are a limited, personal, non-transferable, revocable license to use within the service — they are not the user's property, have no value outside the game, and cannot be redeemed for real money or transferred to another account or person, except where the service expressly enables it.
REX MU's shop model is not "pay-to-win": what is sold are cosmetic and convenience upgrades, not decisive competitive advantages. We may adjust the catalog, prices and VIP benefits in the future; changes are not retroactive to purchases already made within the withdrawal period described in the next section.
The payment method available today is MercadoPago, processed on the website. This section is written generically: if REX MU releases an app in the future that offers in-app purchases, those purchases may also be subject to the relevant app store's billing system (Google Play, App Store) and its own policies, without changing what this section provides for purchases made on the website.
As a consumer in the Argentine Republic, you have the right to withdraw from a distance purchase (Art. 34, Consumer Protection Law 24.240; Art. 1110, Civil and Commercial Code; Ministry of Economy Disposición No. 954/2025, which unified and replaced the earlier Resolución 424/2020).
How to exercise it: email support@rexmu.online with "Botón de arrepentimiento" in the subject line, your username, and the purchase you want to reverse. You do not need to log in to the site to do this — this email is the enabled channel. We will reply within 24 hours through the same channel, with a confirmation code for your request.
Deadline: you have 10 calendar days from the date of purchase to exercise this right.
What it covers: the right of withdrawal applies to any RP balance or VIP time you have not yet used in-game at the time of your request. That unused balance is refunded.
What it does not cover: the portion of RP you have already spent in-game (for example, to buy an item or activate VIP time that has already run) is considered a digital service or content already consumed, under the exception in Article 1116 of the Civil and Commercial Code, and is not refundable. This exception applies only to the portion actually consumed, not to the pending balance.
This botón de arrepentimiento also covers cancelling any subscription or recurring service REX MU may offer in the future, in line with the unification of the "botón de baja" under Disposición 954/2025.
REX MU is currently in a public testing phase (beta). This means the server may undergo restarts, unscheduled maintenance and, in some cases, data resets (wipes) affecting characters, items or in-game balance, as announced on the site or in-game. We do not guarantee a minimum uptime or uninterrupted availability of the service.
If a wipe were to affect RP or VIP purchased with real money, we will consider a reasonable RP compensation for affected accounts, but this is not a promise of a cash refund beyond what is described in the withdrawal-right section.
We may suspend or cancel an account, with or without prior notice, when we detect a violation of these Terms, of the Code of Conduct, use of cheats or unauthorized software, exploiting bugs for an advantage, fraudulent activity related to payments, or any conduct that puts the service or other players at risk.
Cancelling an account for a violation does not create a right to a refund of RP or VIP already spent. Unused RP or VIP on an account cancelled for a user's violation may be forfeited, without prejudice to the withdrawal-right section where applicable.
You can request deletion of your account at any time at delete-account.html, without needing the game client installed. That page explains in detail what data is deleted, what is retained, and why. For more on how we handle your personal data, see our Privacy Policy.
REX MU's own content (the "REX MU" name, text, site design, original elements) belongs to its authors and may not be reproduced commercially without authorization.
The service is provided "as is", with no guarantee of continuous availability, freedom from errors, or fitness for a particular purpose. To the extent permitted by applicable law, REX MU is not liable for indirect damages, loss of game progress, or loss of items or balance resulting from technical failures beyond our control, nor for content posted by other users in chat or other social features.
Nothing in this section limits the non-waivable rights that Consumer Protection Law 24.240 and the Civil and Commercial Code grant to consumers, including the right of withdrawal described above.
We may modify these Terms to reflect changes in the service, in applicable regulations, or in our practices. When a change is significant, we will announce it on the site (for example, in the news section) with reasonable notice before it takes effect. The "last updated" date at the top of this page shows when the text was last modified. Continued use of the service after a change takes effect means you accept the new version.
These Terms are governed by the laws of the Argentine Republic. For any dispute that cannot be resolved through the consumer-service channels described in these Terms, the parties submit to the competent courts of the Argentine Republic, without prejudice to any venue that consumer-protection regulations grant the user at their place of residence.
For any question about these Terms, write to us at support@rexmu.online.