You're looking for information on a potential port of Grand Theft Auto III (GTA III) for the PlayStation Portable (PSP) that has been fixed. Here's what I found:
Critically, the PSP version ran at a stable 30 FPS most of the time, with dips only during heavy explosions. It was considered a miracle of handheld engineering. gta+3+psp+port+fixed
Compatibility & Ease of Installation
Content & Features