Official PKGs from Sony are encrypted with a per-title key. This tool, often bundled with make_package_npdrm, can decrypt retail PKGs if you have the proper key (requires dumping from a console). For homebrew and unencrypted PKGs, it’s not needed.
For this tutorial, we’ll use pkg-extract (command line) and PkgView (GUI). Both are free.
Later PKGs (especially for PS2 classics and some minis) used additional DRM: each console had a unique PSID, and a .rap (License Activation Proof) file was required to unlock content. Extractors evolved to simulate the PS3’s license engine, using user-provided .rap files to generate the correct AES key on the fly. pkg extractor ps3
If you want, I can:
The tools are dual-use. Legitimate uses: Official PKGs from Sony are encrypted with a per-title key
Illegitimate uses: distributing decrypted game files for warez. The developers of RPCS3 and PkgView explicitly disclaim liability.
This is a critical section. PKG extraction tools themselves are legal – they are file archivers, no different from WinRAR or 7-Zip. However, what you do with them may not be. The tools are dual-use
Always respect intellectual property. The PKG extractor is a tool for preservation, modding, and development – not piracy.