– Not possible via emulation. Your only options are:
As mentioned earlier, we do not provide direct links to download Uncharted 4 ISO files. However, you can try searching for "Uncharted 4 PPSSPP ISO free download" or "Uncharted 4 Android PPSSPP ISO" on your favorite search engine to find a reliable source. Some popular websites that offer PSP game ISO files include: uncharted 4 ppsspp iso download for android free link
The short answer is that Uncharted 4 is not available for PPSSPP – Not possible via emulation