The .RAR extension is a compressed file format. Unlike .zip, .rar is proprietary and often used by scene groups to split large files (even though Clock Tower Rewind is under 2GB). You will need software like , 7-Zip , or Unarchiver to extract the NSP file from inside.
Before unpacking the file name, let’s clarify the product. Clock Tower Rewind is not a simple port. It is an enhanced re-release of the original Super Famicom horror classic. It introduced: