: Re-visit the page where you downloaded this; usually, the uploader provides a readme.txt inside the archive with specific instructions for their version.
Since .rar is a compressed archive, you will need software to open it. : Use 7-Zip (free and open source) or WinRAR . File: COS_RO2_DLC.rar ...
Follow these steps to extract and install the content safely: 1. Extract the Files : Re-visit the page where you downloaded this;
Look inside the extracted folder to see what kind of files you have: File: COS_RO2_DLC.rar ...