Result: Your PSP can now boot into custom firmware automatically.

Forza Horizon was never released for the PlayStation Portable (PSP).

When you see videos or downloads for a "Forza Horizon PSP ISO," you are actually looking at a heavily modded version of an authentic PSP racing game—usually Test Drive Unlimited or a Need for Speed title—that has been reskinned with Forza menus, UI overlays, and car models. How to Install Racing ISOs and Mods on PSP

on the PSP. It features a massive, open-world recreation of Oahu, Hawaii, licensed cars, and a "car lifestyle" progression. Gran Turismo PSP: If you want the "car porn" aspect and deep simulation of Forza Motorsport , this is the gold standard. It runs at a flawless 60fps. Midnight Club 3: DUB Edition:

: Features a massive car list and realistic driving physics. Midnight Club 3: DUB Edition Remix : The king of street racing and car customization on PSP. Race Driver 2006 (TOCA)