While there is no official Forza Horizon release for the PlayStation Portable (PSP), the community has kept the dream alive through clever "modded" versions—often built on the engine of Test Drive Unlimited.

He woke up to a notification on his PSP’s calendar app—an app he never opened.

Installing Forza Horizon on PSP using ISO: A Step-by-Step Guide

running custom "skins." Modders swap out the textures, UI, and music to make the game look like Forza. While they can be fun, they don't have the physics, car list, or open-world scale of a true Forza title. 2. The Best Alternatives (The "Forza Feel")