When browsing for downloads, you will see these two file types. Here is what they mean:
If you want to play a legitimate GTA game on the PSP or an emulator like Rockstar Games officially released three titles for the platform: Grand Theft Auto: Liberty City Stories Grand Theft Auto: Vice City Stories Grand Theft Auto: Chinatown Wars Understanding San Andreas "PSP Downloads" gta san andreas psp iso cso zip file download upd
Rockstar Games never released GTA: San Andreas for the PSP. The only official San Andreas title on a portable device was the poorly received mobile port (iOS/Android) and later the Definitive Edition for modern consoles and PC. When browsing for downloads, you will see these
Distributing copyrighted game code (even modded) is illegal in most countries. The safest legal path is: When browsing for downloads