When hunting for files, "high quality" means more than just a working game. You should look for:

Once you secure your high-quality files, you need to configure your software or hardware properly to maximize visual fidelity and performance. For RPCS3 Emulator Users

Once you've obtained high-quality PS3 PKG games or ROMs, here are some tips to enhance your gaming experience:

In RPCS3, navigate to File > Install Packages/Raps/Edats , select your PKG file, and repeat the process for the RAP file.