While you still can't play Ascension on PPSSPP (because it's a PS3 game), you can play the PSP titles in 4K resolution on your PC or Android phone using the PPSSPP emulator. For Ascension on PC, you would need the emulator, which requires a very powerful computer.
There are two incredible, native God of War games for the PSP. These are optimized for the hardware and are considered masterpieces: God of War: Ghost of Sparta 2. PS Remote Play god of war ascension psp iso work
| Game | ISO File Size | How to Get (Legally) | | :--- | :--- | :--- | | | ~1.4 GB | Rip from your own UMD, or buy from PS Store (PSP/PS Vita/PS3) | | Ghost of Sparta | ~1.6 GB | Rip from your own UMD, or buy from PS Store | While you still can't play Ascension on PPSSPP