The RPCS3 emulator prefers uncompressed folders (JB Folder format) or ISOs. If you download a highly compressed archive (like .7z or .rar), you must extract it before the emulator can recognize the game. Top Benefits of Using Compressed & Patched Files
The Ultimate Guide to PS3 ISO Games: Highly Compressed, Patched, and Ready to Play ps3 iso games highly compressed patched
Use tools like IRD files to verify that the ISO hasn't been corrupted during compression. The RPCS3 emulator prefers uncompressed folders (JB Folder
Patched ISOs are often modified to run directly on Custom Firmware (CFW) or PS3HEN without needing the original disc. ps3 iso games highly compressed patched