Because .rar is a compressed format, you will need a utility like 7-Zip or WinRAR to access the contents.

Right-click the file and select "Extract to Optional-Bonus-OSTs/" . This keeps the contents organized in their own folder.

These files are purely for your enjoyment outside the game. If you delete them, the game's audio and gameplay will remain unaffected.

You do not need to move these files into the game directory for them to work; you can keep them anywhere on your drive to listen to or view. 2. Common Contents These bonus archives generally include: