This is the most important part. The community port is essentially an "empty shell" application. It does not contain the game's art, music, or maps due to copyright and file size reasons.
Installing OMORI on Nintendo 3DS via CIA: What You Need to Know
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Do not use YouTube video guides for modding (they go out of date). Use the definitive text guide:
Before attempting to transfer and install the CIA file, ensure your console meets the following hardware and software requirements: This is the most important part
A (Content Installed Application) is a file format used by the Nintendo 3DS for installing software, such as games, apps, and themes, directly onto the system's SD card. Installing a CIA file allows the application to appear on the 3DS home menu as if it were a legally purchased digital game. Prerequisites: Before You Install Omori
To proceed, your console have Custom Firmware (CFW) installed. Think of CFW as "administrator access" for your 3DS; it removes the limitations placed by Nintendo and allows you to run homebrew software and install unofficial titles. The most popular and reliable CFW for the 3DS is Luma3DS. The "gold standard" guide for installing Luma3DS on any 3DS or 2DS model is maintained at 3ds.hacks.guide . Installing OMORI on Nintendo 3DS via CIA: What
If you’re having trouble installing a CIA file, here are some common issues and solutions.

