Click "Extract All." Repeat this process for higher-numbered catalogs, overwriting older files when prompted to ensure you have the most up-to-date assets. How to Pack Mods for X Rebirth
The is a utility developed by Egosoft for managing and extracting game data from .cat and .dat files. While originally designed for X Rebirth , it is widely used by the modding community for X4: Foundations to unpack game assets for modification. Key Features and Usage
It was 800 megabytes.
Desperation leads people to strange places. Ethan opened a secondary monitor and navigated to an old, forgotten forum: The Archive Depths . It was a digital graveyard for abandoned software. X Rebirth Catalog Tool 1.10
Extract the contents of the ZIP folder into a dedicated modding directory (e.g., C:\XRebirthModding\ ).
Run the packing command (typically utilizing the -c or create switch): XRebirthCatTool.exe -c C:\XR_Modding\MyMod sub_ext_01.cat Use code with caution.
You might ask: Why get excited over a point release? Previous versions of catalog tools for the X series were functional but clunky. Version 1.10 introduced subtle but critical improvements that changed the workflow: Click "Extract All
– Version 1.10 can only unpack .cat files. It cannot repack modified files into new .cat archives. For repacking, you must use the official XRCatTool.exe (from Egosoft SDK) or another third-party tool. This is the single biggest missing feature.
The X Universe games are celebrated for their vast scale and deep modding capabilities. At the heart of customizing X Rebirth is managing its packed game data. The is the essential utility for unpacking, modifying, and repacking the game's core archives. Whether you want to tweak weapon stats, overhaul the user interface, or optimize performance, mastering this tool is your first step.
To help you get started on your modding project, let's look at the next steps for setting up your environment or managing file structures. Key Features and Usage It was 800 megabytes
A text-based index file containing metadata, file paths, and byte sizes.
Pros
Summary
Mirror the exact folder structure of the base game inside your custom mod directory. For example, a script tweak must sit inside YourModName/md/ .