Emulators themselves are 100% legal. PPSSPP is open-source and legitimate software. However, downloading copyrighted game ROMs (ISOs) without owning the original disc or digital license is copyright infringement in many countries.
How to do it legally:
Open the Google Play Store on your Android device and search for PPSSPP. You’ll see two options: resident evil 4 ppsspp android install
Tap Install on the free version. Wait for the download to complete.
You need the emulator to run the game files on your Android phone. Emulators themselves are 100% legal
Absolutely—with caveats. The PSP version of Resident Evil 4 includes:
On a modern Android device with a controller, you get: Open the Google Play Store on your Android
The biggest downside: no official controller vibration and missing the stunning HD textures from later re-releases. Still, for a mobile survival horror fix, this setup is hard to beat.