Or the zip contains a binary that must be reversed.
Set the archive format to ZIP and name it (e.g., games.zip ). On Windows Select Folder: Right-click your mythroad folder. Send To: Choose Send to > Compressed (zipped) folder .
$ pkcrack -C mythroad.zip -c knownfile.txt -P knownplain.zip -p knownfile.txt -d decrypted.zip