Sites may ask you to download other apps to "unlock" the file; these never work.
There is no official Forza Horizon 4 PPSSPP zip file because the game was never released for the PlayStation Portable (PSP). Forza Horizon 4 is a high-end PC and Xbox title, and no legitimate "ISO" or "CSO" file exists for mobile emulators like PPSSPP. ⚠️ Security Warning forza horizon 4 ppsspp zip file download for android