This is the best modern solution. Install (the PS3 emulator) on your Steam Deck or Windows handheld. With proper settings (SPU block size set to Mega, preferred SPU threads to 2), God of War: Ascension runs at 30-40 FPS on Steam Deck—fully portable, fully playable. No “PSP ISO” needed; you’ll need a PS3 disc dump (JB Folder format).