Derivative Guidelines

Last updated: September 4th, 2026

Here at lowiro, we are more than happy to see fans of In Falsus using its characters and world in their own original works. Please refer to these guidelines for any questions about what is and isn’t permissible in derivative works.

Notice: About Spoilers

• Please be mindful of any scenario or gameplay-related spoilers in your content. Many players may wish not to be spoiled before seeing something for themselves.
• When creating content, streaming, posting on social media etc, we request you to clearly mark or hide spoilers beforehand where needed.
• Please use the hashtag “#infalsus_spoiler” for any contents or posts that may include spoilers. Do not use “#infalsus” when posting these spoilers.
• In particular, when referring to contents towards the end of “Arc 3” and onwards, we recommend that you mark it as a spoiler and use “#infalsus_spoiler”.
• The final decision ultimately rests with the good judgment of each player and content-creator. We kindly ask that you create content and post on social media in an appropriate manner and in good faith.

1. What You Can and Can’t Use

The general rule is that you may not use any assets or materials released by lowiro or copyrighted by lowiro in either digital or physical form. This includes, but is not limited to, anything released in the In Falsus game, any official channels such as In Falsus’ SNS accounts and Discord, and any official physical or digital merchandise.

These guidelines grant you permission to use characters, settings, scenario, and other contents included with In Falsus’ scenario for derivative works. While some other characters and settings, such as certain events, are governed by the same guidelines, other content may require permission from other copyright holders, such as collaborations. These guidelines do not cover such content, and you may have to check for permission from the respective copyright holders before using them.

Artwork: You may not copy or use any game assets, including but not limited to character in-game graphics, for use in your own works. This includes both digital assets and physical ones, eg. designs and artwork from official CDs. However, you may create your own artwork based on the game if you wish, as long as you’re not tracing any of the aforementioned assets.

Music: You may not use any of the music or sound effects included in the In Falsus game or on any of its official soundtracks for any purpose, including derivative works. This includes fanmade charts and levels for rhythm games.

Scenario: You may not copy any of the written scenario text in In Falsus for use in derivative works. However, you may use the scenario itself as a basis for your own works, such as in novels or comics.

Translations: If you’d like to write a translation of In Falsus’ scenario in a currently unsupported language, please get in touch with us at contact@lowiro.com describing how you plan on using it.

Logo: You may not use the In Falsus logo, the lowiro logo, or any images closely resembling them for any purpose, including derivative works.

2. What You Can Use It For

lowiro expressly forbids any elements of In Falsus to be included in the following types of derivative works:

• Games (physical or digital)
• Software
• Any derivative works created by any type of incorporated entity

Other types of works, such as fanart, novels, and comics, whether physical or digital, are permitted, as long as they follow all the rules stated in these Guidelines.

Individuals are permitted to produce and sell these works freely, provided that quantities do not exceed 200 units.

Prior authorization by lowiro is required for individuals producing over 200 units (including all re-issuing, re-production, and editions of the same works), which can be requested via the Contact Us form.

3. Disclaimer

These guidelines do not release any copyrighted contents to the public domain, nor do these guidelines change the copyright status of copyrighted contents. lowiro reserves the right to disallow any derivative use or withdraw these permissions at its discretion. It also reserves the right to modify these guidelines at any time without notice. Please make sure to check the latest version of these guidelines before creating any derivative works.