In the context of the PlayStation 3 (PS3), a PKG file is the installation package format used by Sony for games, updates, DLC, and system software. A "PS3 PKG Store" is not an official Sony service. Instead, it refers to third-party homebrew applications that run on a modified (jailbroken or custom firmware) PS3, allowing users to browse, download, and install PKG files directly from online repositories.
If you search for "PS3 PKG Store," you will likely find three major names. Note: As of late 2024, some servers have been taken down or require specific DNS settings. ps3 pkg store
Modded PS3: Your console must be running Custom Firmware (CFW) or PS3HEN. Report: Understanding the PS3 PKG Store 1
Future Directions
Yes, but only for the technical user.
However, if you want to play online multiplayer (Call of Duty: Black Ops 2, GTA V) after using a PKG store, you are playing with fire. Sony bans waves hit modded consoles monthly. Sony Computer Entertainment