Technically, there is no official Resident Evil 4 ISO file for the PSP. However, several and "PSP Editions" exist that adapt the game's assets (models, textures, and audio) to run on the PPSSPP emulator. These mods are often based on other game engines or heavily modified versions of existing PSP titles to mimic the RE4 experience. How to Download and Install Resident Evil 4 PPSSPP
Resident Evil 4 for PPSSPP: Download, Setup, and Gameplay Guide Ppsspp Games Download Resident Evil 4-
: Search for "Resident Evil 4 PPSSPP ISO" or "Biohazard 4 PSP Mod" on trusted community sites. Technically, there is no official Resident Evil 4
: Get the latest version from the official PPSSPP website or the Google Play Store. Ppsspp Games Download Resident Evil 4-