YoRHa Protocol Launcher

A Windows launcher for the YoRHa Protocol mod for NieR:Automata, built with Flutter. Also supports macOS and Linux via Wine/CrossOver.

Requirements

• Flutter SDK ^3.9.2
• NieR:Automata (latest Steam version)
• Windows (native), or macOS/Linux with Wine or CrossOver

Setup

1. Install Dependencies

flutter pub get

2. Generate Riverpod Code

dart run build_runner build --delete-conflicting-outputs

3. Add Required Files

Place the following files in assets/bins/:

• launch_nier.exe - Launcher executable
• modloader.dll - Modloader library
• yorha_protocol.dll - YoRHa Protocol mod library

Building

flutter build windows

Usage

1. Launch the application
2. Click SELECT to choose your NieR:Automata.exe file
3. The launcher validates the executable (checks for the PRJ_028 signature)
4. Click PLAY to start NieR:Automata with the YoRHa Protocol mod
5. Click STOP to terminate the game

How It Works

On first launch, mod files are copied from bundled assets to a launcher directory:

• Windows: %APPDATA%\YoRHaProtocolLauncher
• macOS (CrossOver): ~/Library/Application Support/CrossOver/Bottles/<bottle>/drive_c/users/<user>/AppData/Roaming/YoRHaProtocolLauncher
• Linux (Wine): ~/.wine/drive_c/users/<user>/AppData/Roaming/YoRHaProtocolLauncher
• macOS (native): ~/Library/Application Support/YoRHaProtocolLauncher
• Linux (native): ~/.local/share/YoRHaProtocolLauncher

When you click PLAY, the launcher executes:

launch_nier.exe --modloader-dll <path> --mod-dll <path>

The working directory is set to your NieR:Automata installation folder.

Links

• Source Code
• Guide / Documentation
• Discord
• NAO Launcher (alternative)