BD2 Mod Manager needs to know where Brown Dust 2 is installed so it can write synced mods to the right place. The game directory is the folder that contains BrownDust II.exe.
What the game directory is
The game directory is not the root of your Steam library or the Neowiz launcher folder. It is the specific subfolder that holds the game executable.
A typical path looks like:
F:\Neowiz\Browndust2\Browndust2_10000001
Browndust2_10000001\
├── BrownDust II.exe
├── BepInEx\
│ └── plugins\
│ └── BrownDustX\ ← BrownDustX mod loader lives here
│ └── mods\
│ └── BD2MM\ ← BD2MM writes enabled mods here during Sync
└── ...
Do not point BD2 Mod Manager at a parent folder such as Browndust2\ or your Steam steamapps\ directory. The app validates the path by looking for BrownDust II.exe directly inside the selected folder.
Auto-detect
BD2 Mod Manager can automatically find your game directory by reading the Neowiz launcher registry entry (HKEY_CURRENT_USER\Software\Neowiz\Browndust2Starter\10000001). If the game was installed via the Neowiz launcher, click Auto-detect in the game directory field and the app will populate the path automatically.
Auto-detect only works for Neowiz launcher installations. If you installed via Steam or a custom path, set the directory manually using the steps below.
Finding your game directory
Via the Neowiz launcher
Open the Neowiz launcher
Launch the Neowiz Game Launcher and sign in if prompted.
Open game settings
Click the gear icon or Settings next to Brown Dust 2 in your game library.
Copy the install path
The launcher shows the installation path. Copy the full path — this is your game directory.
Via Windows File Explorer
Open File Explorer
Press Win + E to open File Explorer.
Navigate to the game folder
Browse to where you installed the game. Common locations:C:\Program Files\Neowiz\Browndust2\Browndust2_10000001
D:\Games\Browndust2\Browndust2_10000001
F:\Neowiz\Browndust2\Browndust2_10000001
Confirm BrownDust II.exe is present
You should see BrownDust II.exe in this folder. If you do, this is the correct directory.
Via Steam (if using Steam version)
Open Steam
Open Steam and go to your Library.
Open local files
Right-click Brown Dust 2 → Manage → Browse local files.
Copy the path from the address bar
File Explorer opens directly to the game directory. Copy the path from the address bar — this is the folder to use in BD2 Mod Manager.
Setting the game directory in BD2 Mod Manager
Open Settings or the first-launch prompt
On first launch, the setup wizard asks for your game directory automatically. To change it later, go to Settings → General → Game directory.
Click Browse
Click Browse and navigate to your game directory in the folder picker.
Select the folder
Select the folder that contains BrownDust II.exe and click Select Folder (or OK).
Confirm the path
The path field updates with your selection. BD2 Mod Manager validates that BrownDust II.exe exists in the selected folder and shows a confirmation.
After setting the game directory, check the BrownDustX tab to confirm the mod loader is detected. If it is not installed, the tab provides a one-click install option.