If you wish to play Cuphead safely and legally on your PlayStation 4:

: Files of this nature are distributed on third-party file-sharing sites and torrents. They frequently contain malware, adware, or trojans disguised as the game.

The file is a compressed archive containing a pirated copy of the game Cuphead for a modified PlayStation 4 console. 🔍 File Breakdown

: Standard PlayStation 4 consoles cannot run .pkg files downloaded from the internet. They only run on consoles running custom firmware (jailbroken).