Sniper Elite 4 was never released for the PlayStation Portable. The hardware of the PSP is simply not powerful enough to run a game built for the PS4 or Xbox One generation. Therefore, a direct port of Sniper Elite 4 for the PPSSPP emulator does not exist.
The confusion stems from two major sources: sniper elite 4 ppsspp zip file download
TechLegacy Guides Reading Time: 6 minutes Sniper Elite 4 was never released for the