Happy emulating, and watch out for those fake downloads!
Since the original game is too large and technically advanced for the PSP (GTA 4 requires roughly 15-30 GB, while PSP games are limited to 2 GB), fan-made versions use the engine of existing PSP titles like . Key Features of the Fan Mod: can you play gta 4 on ppsspp
It was a massive, open-world game requiring 512MB of RAM (minimum) and a powerful GPU. The PSP simply couldn’t handle it. A direct port would have required cutting so much content (downgrading textures, removing physics, shrinking the city) that it would no longer be GTA 4. Happy emulating, and watch out for those fake downloads