Mod Manager

A graphical interface manager for managing appearance mods of "Nioh 3". Point to a folder containing the module compressed package (.zip.7z.rar), browse available modules, and install or uninstall it with one click. Automatically handles file extraction, RDB file patching using yumia tools, and clean uninstallation. Track installed mods so you know which mods are active at all times. Standalone Windows executable program.

Nioh 3 Mod Manager

🎉 **Welcome to the "Nioh 3" Mod Manager! ** This is a graphical interface management tool specially designed for "Nioh 3" appearance mods, allowing you to say goodbye to tedious manual operations and easily enjoy the fun brought by mods!

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✨ What is this?

This is a standalone graphical interface application for installing and uninstalling appearance mods for Nioh 3.

**PLEASE NOTE**: This manager does not manage DLL-based mods.

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🚀 Core functions

• **📂 Convenient Scan**: Automatically scan the module compressed packages (.zip, .7z, .rar) in the specified folder and list them in a refreshing interface.
• **🎨Multi-option support**: Detects mods that contain multiple options (e.g. color variants) and lets you choose which one to install.
• **⚙️ Multi-feature mods**: Support for multi-feature mods via `nioh3modmanifest.json` - configure each feature (such as armor style** and ** chrome color) independently in a single installation step.
• **🔧 Automatic processing**: Extract the files to the game's package directory, and automatically run the yumia tool to patch the RDB files.
• **⚠️ Conflict Detection**: Warn before installing a mod that replaces the same resource as an already installed mod.
• **📊 Installation Tracking**: Record installed modules, allowing you to know which modules are active at any time.
• **🧹 Clean Uninstall**: Remove mod files, restore RDB backup, and repatch remaining mods.
• **📁 Format compatibility**: supports standard modules (including package/ subdirectory), loose modules (files in the root directory of the compressed package) and multi-feature manifest modules.

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📥 Installation Guide

**Step 1: Download the yumia patching tool**

Download `yumia_mod_insert_into_rdb.exe` and place it in your game package folder:

`C:\Program Files (x86)\Steam\steamapps\common\Nioh3\package\yumia_mod_insert_into_rdb.exe`

**Step 2: Create the module folder**

Create a folder anywhere to store the mod package you downloaded. For example:

`C:\Nioh3_mods`

Download the module from and put the compressed package file (.zip, .7z, .rar) into this folder. **No need to unzip** - Mod Manager directly reads the compressed package.

**Step 3: Unzip and run the mod manager**

Download the main file from this page, unzip the zip package, and run `Nioh3ModManager.exe`.

On first launch, click **Settings** and set:

• **Mods Directory**: The folder created in the second step (for example `C:\Nioh3_mods`).
• **Game Package Directory**: Your "Nioh 3" game package folder (for example `C:\Program Files (x86)\Steam\steamapps\common\Nioh3\package`).

Once setup is complete, your mod will appear in the list. Select a module and click **Install** to install it!

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✅ System requirements

• Windows 10 or 11 (64-bit)
• "Nioh 3" (Steam version)
• `yumia_mod_insert_into_rdb.exe` has been placed in the game's package folder (see step 1)

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👨‍💻 To the mod author

**Simple Mod - One set of files, no options**

Place your files in a `package/` subdirectory:

```

my_mod.zip

└── package/

├── 0xffaabb00.fdata

└── 0xffaabb00.yumiamod.json

```

It is also supported to place files directly in the root directory of the compressed package (no need for a `package/` subdirectory).

**Mods containing mutually exclusive options - user selects one of the variants**

Place each variant in its own named subdirectory, each containing a `package/` folder. The subdirectory name (e.g. Red, Blue, Gold) will become the label displayed in the UI.

**Multi-feature mod …