Here’s why: was never released on PSP or any console that PPSSPP emulates. It’s an Xbox One/PC/Xbox Series game. Any file named “Forza Horizon 4 PPSSPP ISO” is almost certainly fake , a virus, or a mislabeled file.
Try real PSP racing games like:
While no longer on digital storefronts, you may still find physical copies or digital keys at retailers like Cloud Gaming: Forza Horizon 4 PPSSPP ISO Zip File Download Fo...