The PSP couldn’t run Uncharted 4. The game requires ~50GB of storage, advanced shaders, physics, and a powerful GPU. The PSP maxed out at 1.8GB UMD discs and had 64MB of RAM.
Many sites claiming to offer a "highly compressed" ISO are often traps for malware or require you to complete endless "human verification" surveys. Legitimate Ways to Play Uncharted on Mobile Uncharted 4 Ppsspp Iso Download For Android
If a site promises a PSP ISO but instead pushes you to download a standalone .apk file, do not install it. These files frequently steal personal data or flood your phone with background ads. Real Ways to Play Uncharted on Mobile The PSP couldn’t run Uncharted 4
If you have downloaded a fan-made "Uncharted" PPSSPP ISO or similar action game meant for PSP emulation, here is the standard process for setting it up on your Android device: Many sites claiming to offer a "highly compressed"