If it's related to a specific game mod or artist, I can try searching within those specific communities. Can i add RAR attachments as i'm getting errors?

You will need a dedicated extraction tool. Popular options include WinRAR , 7-Zip , or The Unarchiver for macOS.

If your browser tries to download it as a .php file or a generic attachment , you may need to manually rename it back to .rar to open it correctly.

However, if you have found a link and are looking to handle the file, here is what you need to know about working with .rar archives: Managing .RAR Files

Since this file name doesn't appear to be a widely known software or media package, please be cautious:

A .rar file is a compressed archive that bundles multiple files or folders into a single, smaller package to save space.