Install the latest version of the PPSSPP Emulator from the Google Play Store or the official website.
These are "homebrew" projects where dedicated developers have rebuilt assets (models, textures, and UI) to create a version of the game that can run within the PSP hardware's limitations. Resident Evil 4 Ppsspp Iso
It is important to clarify that there is no official Resident Evil 4 PSP game. The "ISO" files found online are typically one of two things: Install the latest version of the PPSSPP Emulator
Some versions are actually highly modified versions of other PSP titles (like Syphon Filter or Resistance: Retribution ) reskinned to look and play like Resident Evil 4 . Key Features of Fan-Made ISOs Resident Evil 4 Ppsspp Iso