These are dumped versions of games often used on jailbroken consoles. They use "fake" verification to bypass standard license checks, allowing users to run backups of games they own without needing the original disc. How to Install PKG Games on PS4
In the context of the PlayStation 4, a (package) file is the standard file format used by Sony to distribute and install digital content, including full games, updates, and DLC. On a standard retail console, these files are encrypted and require a legitimate digital license to run. Types of PKG Files Retail PKG: games ps4 pkg