All games are at the native PSP resolution of 480 x 272 any higher and everything lags. Lakka is officially stable for the Raspberry Pi 4 and PSP Emulation using PPSSPP is looking Really Good so far! In this video, I test out 10 PSP games Like God of chains Olympus, Kingdom hearts, Ratchet and clank, Tekken and Monster Hunter on the Pi 4 using Lakka and the PPSSPP Core.
Get Lakka Here: https://www.lakka.tv/