A dedicated port is available via the Nintendo eShop . Risks of "PPSSPP" Downloads for Modern Games
The direct answer is that Sniper Elite 4 was never officially released for the PSP Sniper Elite 4 Ppsspp Extra Quality Download
(which was on PS2/PC and can sometimes be emulated or ported) and apply skins or textures to make it look like the newer games. Fan-made Projects A dedicated port is available via the Nintendo eShop