Most quality "remix" packs include a .txt or .nfo file inside that explains the specific contents, bitrates, or credits for the creators.
Use 7-Zip (free/open-source) or WinRAR . Right-click the file and select "Extract to Retro Remix Quality (10)/".
These are vintage game files. You will need an emulator (like RetroArch, Mesen, or Snes9x) to play them.
“The best way to predict the future is to invent it.”
- Alan Kay, American Computer Scientist