About This Mod
You last downloaded a file from this mod on 06 Apr 2026.
Nioh3ModManager is a standalone Windows GUI mod manager for Nioh 3 cosmetic mods. Point it at a folder containing .zip, .7z, or .rar archives, browse the mods inside, and install or uninstall them with a single click. It uses LooseFileLoader as the primary method, keeps compatibility with legacy Yumia‑style patching, and tracks which mods are installed so you always know what is active.

A big thanks goes to eArmada8 for the yumia_fdata_tools ecosystem and to Kassent for the Nioh 3 DLL loader and the LooseFileLoader plugins.

What Is This?
This is a standalone GUI application that installs and uninstalls Nioh 3 asset mods directly from archive files.

The manager supports two workflows:

Legacy Yumia patch installs
LooseFileLoader loose‑file installs (preferred)

It does not manage unrelated DLL gameplay plugins beyond verifying that the required loader and plugin files are present.

Key Features

Scans a folder of mod archives (.zip, .7z, .rar).
Auto‑detects supported archive structures.
Supports manifest‑style mods (nioh3modmanifest.json) with per‑feature option selection.
Supports direct loose‑file archives, including multi‑folder optional components.
Backend‑aware install routing (Yumia or LooseFileLoader).
Global migration from Yumia‑managed installs to LooseFileLoader.
Installed‑state tracking and clean uninstall.

Recommended Setup (LooseFileLoader)

Step 1: Install DLL Loader
Step 2: Install LooseFileLoader

Expected files after setup:

<Nioh3>\DINPUT8.dll
<Nioh3>\plugins\LooseFileLoader.dll
<Nioh3>\plugins\LooseFileLoader.ini

Step 3: Create a Downloads Folder
Create a folder for your downloaded mod archives (for example C:\Nioh3_mods) and place your .zip, .7z, and .rar files there.

Step 4: Run Nioh3ModManager.exe
In Settings, configure:

Mods Directory: your downloads folder.
Game Package Directory: <Nioh3>\package.

If you already have active Yumia‑managed installs, use the Migrate Yumia Installs option once the LooseFileLoader prerequisites are ready.

Legacy Yumia Compatibility
The legacy Yumia workflow is still supported for existing setups.

Required file:

<Nioh3>\package\yumia_mod_insert_into_rdb.exe

You can download it here:
yumia_mod_insert_into_rdb.exe

Supported Archive Layouts

Legacy Yumia layout with package/.
Legacy Yumia layout with root .fdata + .yumiamod.json.
Manifest layout via nioh3modmanifest.json.
Direct loose‑file archives (hashed filenames such as 0x11A34982.g1t).

For Direct Loose Archives:

Files at the top‑level archive root are treated as common files.
A single top‑level folder is treated as one standard install option.
Multiple top‑level loose folders are shown as optional checkbox components.

For Mod Authors

Use .zip, .7z, or .rar archives for packaging.

Recommended packaging order:

Best: manifest + loose files.
Good: direct loose‑file archive.
Compatibility fallback: legacy Yumia payloads.

Preferred: Manifest + Loose Files

Example nioh3modmanifest.json:

json

{

  "mod_manager_version": "1.0",

  "mod_name": "Example Mod",

  "common_files_dir": "common",

  "features": [

    { "name": "Skin", "directory": "skin", "optional": false },

    { "name": "Coverage", "directory": "coverage", "optional": false }

  ]

}

Example layout:

text

my_mod.zip

  nioh3modmanifest.json

  common/

    0xA1000001.g1t

  skin/

    Normal/

      0xA2000002.g1t

    Wet/

      0xA2000003.g1t

  coverage/

    Full/

      0xA3000004.g1m

    Top_only/

      0xA3000005.g1m

Direct Loose Layout
Use hashed filenames (for example 0x12345678.g1t) at the archive root or inside top‑level option folders.
Legacy Yumia Package Layout (fallback)

text

my_mod.zip

  package/

    0xAAAABBBB.fdata

    0xAAAABBBB.yumiamod.json

Requirements

Windows 10/11 (64‑bit).
Nioh 3 on Steam.
LooseFileLoader prerequisites (recommended) or the Yumia executable (for legacy support).

Source Code
https://github.com/shell-man-5/Nioh3-Mod-Manager

Nioh 3 Mod Manager