Open Vita3K, locate your dumped game file, and install it. You can now play a full Uncharted adventure with touch controls or a Bluetooth controller.

To conclude the "Uncharted 1 PPSSPP ISO File Download" mystery:

To understand the confusion, we have to look at the hardware.

Don't waste hours chasing fake ISOs. Modern cloud streaming and proper emulation (Vita3K/RPCS3) offer a superior, safe, and legal way to enjoy Nathan Drake’s first adventure on your mobile screen.

If you own a PlayStation 4 or PS5 with the Uncharted: Nathan Drake Collection (which includes Uncharted 1, 2, and 3), you can use the PS Remote Play app to stream Uncharted 1 directly to your phone.