A "repack" or cracked version of a title like GTA V , GTA: San Andreas , or GTA IV .
Immediately run an antivirus scan (such as Windows Defender or Malwarebytes) on the extracted folder before running any .exe or .bat files. Grand.Theft.Auto.rar
Depending on where the file was sourced, it usually contains one of the following: A "repack" or cracked version of a title