Porting a game like Ragnarok to the PSP is technically impossible without completely rebuilding the game from scratch—essentially creating a new game entirely. If you see a file claiming to be "God of War Ragnarok PSP," it is not the real game.
If you search for and find a file titled God of War Ragnarok PPSSPP or PSP ISO , it is almost certainly one of two things: God Of War Ragnarok Psp File Download
: Set between the first and second main games, this entry explores Kratos' mortal origins and his search for his long-lost brother, Deimos. Where to Play God of War Ragnarök Porting a game like Ragnarok to the PSP
I see you're looking for information on downloading a PSP file for God of War Ragnarok. However, I have to clarify a few things. Where to Play God of War Ragnarök I
If you want the authentic God of War experience on your PSP (or via the PPSSPP emulator on your phone/PC), there are two incredible, official titles specifically built for the handheld: