Crimson Desert, JSON Mod Manager

A standalone mod manager for Crimson Desert that uses a secure overlay system to apply byte-level patches through JSON-based mods. It does not permanently alter the original game files, because all modified data is placed in a separate overlay folder that the game reads over the base files.

Features

Single EXE file, just double-click mod_manager.exe, with no need for Python or any extra dependencies.
Dark-themed three-panel interface: Available Mods, Active Mods, and Per-Patch Toggles.
Per-patch controls, so you can turn individual changes inside a mod on or off.
Color-coded categories for easier navigation.
Automatic detection of the Steam install directory.
One-click Apply and Uninstall options.
Automatic backup of the original 0.papgt before any changes are made.
One-click restore from backup.
Safe overlay system, so the original game files remain untouched.

How It Works

The mod manager operates through an overlay method instead of editing the original PAZ archives directly.

It reads the original compressed game files from 0008/, decompresses them using LZ4, applies the selected byte patches, and then recompresses them. The modified files are written to a new overlay folder called 0036/. After that, the tool registers the overlay in meta/0.papgt, allowing the game to load the patched files over the original ones.

When you uninstall the mods, the manager simply removes the overlay directory and restores the original 0.papgt from the backup.

Installation

Download and extract the archive anywhere on your computer.
Double-click mod_manager.exe.
The interface will try to detect your Crimson Desert Steam installation automatically. If it does not, click Browse and set the directory manually.
Choose the mods you want from the left panel and move them into the active list using the arrow button.
If needed, enable or disable specific patches from the right panel.
Click APPLY.
Launch the game.

Uninstalling Mods

Click UNINSTALL in the mod manager to remove the overlay directory and restore the original 0.papgt. This returns the game to a fully vanilla state.

You can also click RESTORE if you only want to restore the backed-up 0.papgt directly.

Folder Structure

mod_manager.exe , the main mod manager executable
mods/ , where you place .json mod files
enabled/ , contains the mods that are currently active
backups/ , stores the automatic backup of the original 0.papgt

Requirements

Crimson Desert on Steam
No Python, .NET, or other additional dependencies, everything is included in the EXE

Compatibility

After a game update, byte offsets can change. If the mod manager finds that the original bytes no longer match the expected offsets, it will skip those patches and report which ones did not apply. In that case, the JSON mod files will need to be updated for the new game version.

CD JSON Mod Manager