Do you prefer or do you have a strong internet connection ?
Navigate through the internal file browser to the folder where you extracted the .iso file. Tap the to launch the game. Optimizing Settings for Smooth Gameplay
Rockstar Games has never released GTA 5 for the PSP or mobile platforms.
This is the most dangerous step. You'll need to find a website that claims to offer a "GTA 5 PPSSPP ISO" or "ZIP" file. These files are often advertised as being a "small size," typically ranging from 300MB to 600MB, which is a far cry from GTA 5's actual size of over 100GB on other platforms.
To understand these downloads, you must first understand the technical limitations of the hardware involved. Rockstar Never Made a PSP Version
If you want a safe, authentic experience using the PPSSPP emulator, stick to the official PSP titles: Grand Theft Auto V system requirements - Can You RUN It
: Use ZArchiver to extract the ISO to your "PSP > GAME" folder.
emulator on Android because GTA 5 was never released for the PlayStation Portable (PSP). The PPSSPP emulator is strictly designed to play PSP games, and GTA 5's hardware requirements far exceed the capabilities of that console.
: The PSP (and its emulator) cannot natively run GTA 5’s engine.
If your zip file included a PSP folder (containing SAVEDATA and TEXTURES ), copy that folder.
: Be cautious when downloading files labeled as "exclusive" or "updated" from unofficial sites, as many can contain corrupted data or malware. How to Install Fan-Made GTA Mods for PPSSPP