Extract the rkt.7z file into a dedicated folder on your PC (e.g., Documents/My Games/Rocket League/Maps ).
If you are unsure of the file's purpose, use these steps to safely open it:
Extract the contents of rkt.7z directly into the cores directory.
If this file contains a Rocket League custom map (usually a .udk file inside), use this method for or Steam versions:
The file "" typically refers to a Rocket League Workshop map or a specific compressed asset package used in game modding . Because it is a .7z file, you must first extract its contents using a program like 7-Zip or WinRAR .
: It is the standard free tool for .7z archives.