The "apun-kagames-biz" portion of the name suggests the file originated from a specific distributor. These sites often password-protect their archives. How to Use the File
The .rar extension indicates a compressed archive. You will need a program like WinRAR , 7-Zip , or The Unarchiver to open it.
Right-click the .rar file and select "Extract Here" or "Extract to [Folder Name]".