Be cautious of .torrent files for non-existent ports, as they often contain viruses or unwanted software.
A full, high-quality port of Resident Evil 4 is available on the eShop and plays perfectly in handheld mode.
No version of RE4 exists as an official PSP ISO.
The Switch version includes all DLC, motion controls, and improved textures. It’s the best official portable version available.
Resident Evil 4 PSP ROM .torrent: The Truth About the Portable Port