There is no official version of Grand Theft Auto III (GTA 3) released for the PSP (PlayStation Portable), which means it cannot be run natively on the PPSSPP emulator

: Use an app like ZArchiver to handle compressed files.

a native PSP title) or ports from other systems like the Dreamcast. Native Alternative : Rockstar Games released an official GTA III: 10 Year Anniversary Edition

Absolutely. (via PPSSPP on Android) is arguably the definitive way to play this era of GTA on the go. The mobile port of GTA 3 has been removed from some app stores due to compatibility issues with new Android versions (64-bit only), whereas PPSSPP is constantly updated.