The zip or ISO files often labeled as "GTA 5 for PPSSPP" are typically one of the following: GTA: Vice City Stories or Liberty City Stories Mods
The newest compressed zip files often range from and include:
Many links claiming to offer "highly compressed" versions (e.g., 18 MB files that supposedly extract to 14 GB) are often corrupted or fake
Better performance on mid-range devices with reduced lag.
Before proceeding, it's crucial to understand a few things: