Official support for Fortnite does not exist on the PSP. The hardware, released in 2005, lacks the processing power, RAM, and modern graphic standards (like DirectX 12) required to run the game, which launched in 2017.
The PSP's lack of a right analog stick and its limited memory make a native port of a modern 100-player battle royale technically impossible. Download Fortnite PSP Nazim
Fortnite is only officially available on PC , PlayStation 4/5, Xbox Series X|S, Xbox One, Nintendo Switch, and mobile (Android/iOS). Official support for Fortnite does not exist on the PSP