A (Package) file is a compressed archive format used to distribute and install games, applications, and updates on the PlayStation 4 system. While officially used by Sony for digital storefront distribution, the format is most commonly discussed in the PS4 homebrew and jailbreak community for installing software outside the official PlayStation Store. Core Functionality & Use Cases
Encrypted and signed; can only be installed on standard retail consoles through the official PlayStation Store. Fake PKGs (fPKGs):
Files sourced directly from Sony’s servers.