1. Products covered
These terms cover Undermax RPG Maker MZ plugins, their Expansion Packs and bundles, and the use of Undermax Cloud. Undermax is an independent project. A purchase grants a license to use the included product, not ownership of its copyright.
Read the product page and included documentation for the edition, features, requirements and any specific license. An expressly stated product-specific license governs that product's differences. Third-party software, assets and services retain their own licenses. These terms do not grant rights to RPG Maker MZ, another developer's work or content you do not own.
Before you purchase: you must be at least 18 and legally able to enter a purchase agreement, or have a parent or legal guardian make the purchase and manage the payment. Use only a payment method you are authorized to use. Check the product requirements and try an available demo first.
2. Using plugins in your games
Your license is personal, non-exclusive and non-transferable. You may use a legitimately obtained plugin in your own commercial and non-commercial RPG Maker MZ games. You may distribute the plugin as an integrated part of those playable games, including your changes needed for the game to work. This does not authorize distributing the plugin as a standalone file, reusable asset, template or editable project for others to reuse.
Do not resell, sublicense, publicly share or redistribute the plugin or its modified source as a separate product. Do not share purchased download links or account access. If a team, classroom or organization needs to share source files, contact [email protected] to confirm the appropriate permission before sharing.
3. Editions and attribution
- Demo editions: Use the features included in the demo and credit Undermax, Undermax Games or Maxii1996 in your game or its documentation. A demo does not grant access to the paid edition. Its features and update availability can differ from the full release.
- Full / Release editions: These require a valid purchase or a license issued by Undermax. Attribution is appreciated but optional unless the specific product expressly requires it.
- Full Experience Mode: Where offered, this is a playable evaluation within the supplied demonstration environment. It does not grant permission to extract the plugin or use it in a separate project.
4. Bundles, Expansion Packs and Card Duel
A bundle includes the products listed for that offer when you purchase it. Each included product keeps its applicable license. Buying a bundle does not automatically include future products, separately priced editions or later additions to a different offer.
An Expansion Pack may require a separately licensed parent plugin, a compatible editor and a specific version. Check those requirements before purchase. Buying an Expansion Pack does not include its parent product unless the offer explicitly says so.
Card Duel System is the RPG Maker MZ plugin; Card Duel Studio is its companion software. Downloading the Studio from the Microsoft Store does not itself include the plugin or RPG Maker MZ. Studio-specific terms and its privacy notice also apply. Artwork shown in the Card Duel demonstration and included example images are illustrative and are not licensed for use in your own personal or commercial projects; use original or properly licensed artwork.
5. Source changes and third-party components
Where a full plugin supplies unobfuscated source, you may inspect and customize it for your licensed projects. Keep copyright and third-party license notices. Do not represent someone else's work as your own or distribute your changes separately without permission.
Do not bypass access controls or extract protected code from evaluation editions, except where applicable law permits it. This restriction does not prohibit the source inspection and customization expressly allowed above, or rights granted by an applicable third-party license.
6. Compatibility, updates and support
Check the supported engine, platform, parent product and version on each product page. RPG Maker MZ support does not imply RPG Maker MV support or compatibility with every third-party plugin. Test changes in a backup of your project before using them in production.
Updates made available for your purchased edition are delivered through its official distribution channel. Support focuses on the current official release. We may ask you to reproduce an issue without custom changes or unrelated plugins. Custom development and compatibility with every future platform or product are not promised. This does not remove support or remedies required by law or expressly included in your purchase.
7. Undermax Cloud and connected services
Undermax Cloud provides access to Undermax information and supported account features. Online features need an internet connection and may require an itch.io account. It does not grant licenses to products you have not acquired. Do not redistribute the application or bypass its access controls except as allowed by its included licenses or applicable law.
Use the release notes and product documentation for current platform requirements and feature availability. Connected services have their own terms. See our privacy notice for website data and product-specific notices for desktop or optional AI features.
8. Purchases, delivery and refunds
Use the official itch.io store and purchase routes linked from undermax.online. The checkout identifies the payment provider and the offer. Friends terms cover referral discounts; code terms cover redemption codes and credits. A referral discount does not change the product license.
For delivery issues, incorrect charges, defective products or refund requests, follow the refund guidance. You can email [email protected] without creating a support account.
9. Rights and responsible use
Undermax retains rights to its original products. A material license breach may lead to suspension or termination of the affected license as permitted by law. Any remedy must respect applicable consumer rights; a breach does not automatically remove rights that cannot legally be excluded.
You are responsible for keeping project backups, securing your accounts and using content you have permission to use. Do not use the service for fraud, unauthorized access or unlawful redistribution. Report suspected security problems privately to [email protected]; do not include other customers' data.
Software may contain errors or be unavailable temporarily. We do not promise compatibility beyond the product's stated requirements. Nothing in these terms excludes mandatory warranties, statutory remedies, or liability that cannot lawfully be limited. Applicable law and competent authorities determine those rights; these terms do not require mandatory private arbitration.
10. Terms versions and contact
Review the terms presented with your purchase and retain your receipt. This revision clarifies current products and purchase routes; it does not retroactively remove rights already granted by an earlier license or offer. Future changes will be identified by their update date. Questions: [email protected].