IoStoreLoaderMod

A UE4SS C++ mod that loads custom assets (.pak, .utoc, .ucas files) into Hi-Fi RUSH at runtime.

What it does

• ✅ Loads .pak, .utoc, and .ucas mod files at runtime
• ✅ Auto-spawns Blueprint ModActors when the game starts
• ✅ Works with Steam, Epic Games Store, and Xbox versions
• ✅ Supports multiple mods with automatic load ordering

Requirements

• UE4SS 3.0.1 with C++ mods enabled
• Mods must be cooked for UE 4.27 with IoStore enabled

Installation

Steam/Epic Games

1. Download IoStoreLoaderBundle.Steam.Epic.zip
2. Extract to: <Game>/Hibiki/Binaries/Win64/

Xbox (Microsoft Store)

1. Download IoStoreLoaderBundle.Xbox.zip
2. Extract to: <Game>/Hibiki/Binaries/WinGDK/

Adding mods

Place each mod in its own folder inside Mods/IoStoreLoaderMod/:

Mods/
  IoStoreLoaderMod/
    dlls/
      main.dll
    ExampleMod/
      ExampleMod.pak
      ExampleMod.utoc
      ExampleMod.ucas
    AnotherMod/
      AnotherMod.pak

To disable a mod: Move its folder into Mods/IoStoreLoaderMod/disabled/

Load order

Mods load in alphabetical order by folder name:

• A_FirstMod loads first (order 200)
• Z_LastMod loads last (order 201, 202, etc.)
• Later mods override earlier ones

To control which mod wins, rename folders:

01_BaseMod/
02_Override/

Blueprint ModActor spawning

For each mounted container, the loader automatically spawns:

/Game/Mods/<ContainerName>/ModActor.ModActor_C

Example: ExampleMod.pak spawns /Game/Mods/ExampleMod/ModActor.ModActor_C

Supported custom events

• HbkPrintToModLoader - Print to console
• HbkConstructPersistentObject - Create persistent objects

Troubleshooting

Mod doesn't load:

• Check UE4SS console for errors
• Verify mod is cooked for UE 4.27 with IoStore enabled
• Ensure container filename matches the expected ModActor path
• Confirm the mod is not in the disabled/ folder

ModActor doesn't spawn:

• Blueprint class must exist at /Game/Mods/<ContainerName>/ModActor
• Class name must be ModActor_C
• Check UE4SS Live View to verify assets loaded

Platform support

Works on:

• ✅ Steam
• ✅ Epic Games Store
• ✅ Xbox (Microsoft Store)

Disclaimer

This mod hooks engine functions and patches memory. Use at your own risk.
Intended for modding and research purposes only.