Open with a text editor (Notepad++) to read the metadata. This often contains the "Project Name" or "Hardware Version" intended for the set. If you see .dat or .db Category: Database/Mapping.
Once extracted, look for these file extensions to determine the guide path: If you see .bin , .rom , or .iso Firmware or Emulation. IP_OD1_Set40.rar
RAR files are proprietary compressed archives. To access the contents: Open with a text editor (Notepad++) to read the metadata