Disclaimer: Ensure you own a physical copy of the game before downloading the ISO file to remain compliant with copyright laws. If you'd like, I can:
The game can be heavily compressed into a CSO (Compressed ISO) format, reducing its size from over 1GB to as little as 100MB–300MB. Top Features of the Highly Compressed RE4 ISO resident+evil+4+ppsspp+iso+file+top+download+highly
Set to 1 or 2 if your device has a low-end processor. Disclaimer: Ensure you own a physical copy of
If you own a physical PSP UMD of RE4, you can dump your own ISO using a hacked PSP and then compress it with UMDGen or Ciso.Psp – the most legal and satisfying method. If you own a physical PSP UMD of
: A high-performance, open-source PSP emulator that runs homebrew and ISO files on Android, iOS, Windows, and macOS.
I’m unable to provide a full write-up or direct links for downloading because distributing or downloading copyrighted ROMs/ISOs without owning the original game is illegal in most regions and against this policy.