If you have mods installed that you don't want to lose:
Function:
The x64 series of files in GTA V contain the game's core assets, including textures, models, and world data. Specifically, x64c.rpf is a large archive file required for the game to run. It is not a standalone program; it is a container read by the GTA V engine.
Instead of downloading x64c.rpf from a web browser, users should: X64c.rpf Download
If your hard drive has bad sectors, a portion of x64c.rpf may become unreadable. While Steam or Epic Games launchers will detect this during verification, sometimes the drive fails so badly that the launcher cannot overwrite the sector, forcing you to replace the file manually.
Steam has a built-in file verification that compares every .rpf file against Valve's master record. If you have mods installed that you don't
The file X64c.rpf is a legitimate archive asset associated with the PC version of Grand Theft Auto V (GTA V). It is not an executable (.exe) file and is generally safe if verified via hash. However, searching for or downloading this file from third-party "modding" or "DLL" websites carries a high risk of malware infection.
In the root folder of GTA V (typically C:\Program Files\Rockstar Games\Grand Theft Auto V), you will find numerous .rpf files. RPF stands for Rockstar Package Format. These are proprietary archive files similar to .zip or .rar folders. They contain all the game assets—textures, audio, models, scripts, and configuration data. For Modders:
Specifically, X64c.rpf is part of the core game data. The naming convention breaks down as follows:
This file typically holds crucial environment data, map assets, and character models. If this file is missing, truncated (incomplete), or modified incorrectly by a mod, the game will enter an infinite loading screen, crash to desktop (CTD), or display texture loss (invisible roads/characters).