For advanced users who want to edit game files or combine several mods, the are the industry standard. Developed by Rick Gibbed, these tools allow you to unpack, edit, and repack .dat/.fat archives.
If you have spent more than a few hours modding Far Cry 3 , you have likely encountered a specific, almost ritualistic set of files: patch.dat and patch.fat . Among the modding community—especially on forums like Nexus Mods, Mod DB, and Reddit’s r/farcry—you will see a recurring, enigmatic phrase:
: New settings to toggle specific on-screen UI elements on or off. Widescreen Support : Added support for 21:9 aspect ratios. Modding Instructions To use these files for modding: Far cry 3 original patch.dat patch.fat 72
To create your own mods or merge existing ones, you must "unpack" these archives.
The patch.dat and patch.fat files are the lifeblood of Far Cry 3 modding, and the version represents the final, stable, vanilla state of the game as intended by Ubisoft. Understanding how to preserve, restore, and identify these files is not optional—it is the single most important skill for any modder. For advanced users who want to edit game
If you still have your original patch.dat and patch.fat from 2012… hold onto them. They’re tiny time capsules.
The launcher will scan your data_win32 folder, detect that your patch.dat or patch.fat does not match the official database, and redownload the clean copies. Method 2: Manual Backup Reinstatement The patch
to download the 1.05 depot or replace their current files with 1.05 versions from community guides. How to Manage Patch Files
That tiny “72” file was a puzzle. It wasn’t a standard save file. Running a hex check, I realized it was a —probably a failed mod installation back in 2015 where I accidentally renamed the backup incorrectly.
The two files work together as a “Big File” archive system:
If you have spent any time trying to modify your Rook Islands adventure, you have likely run into the critical files patch.dat and patch.fat . Specifically, searches regarding original versions, custom total conversions, or specific byte sizes like "72" frequently appear in modding communities.