If you encounter a file labeled as a "Resident Evil 4 PSP ISO" on torrent sites, use extreme caution. Because no official version exists, these files are often:

: Some YouTube videos show "Resident Evil 4 on PPSSPP" using fan-made

No, Capcom never officially released Resident Evil 4 for the PSP. The game was originally built for the GameCube and later ported to PS2, PC, and modern consoles. Because of the PSP’s hardware limitations, a direct 1:1 port was not feasible during the console's lifespan. Ways to Play Resident Evil 4 on Portable Devices