There are community-driven efforts to bring San Andreas to handhelds, though they aren't standard PSP ISOs:
For those looking to download the game on their PSP, a common search query is "GTA San Andreas PSP ISO download 200mb." The game indeed can be downloaded in an ISO format, which is compatible with PSP emulators or directly playable on a PSP with a custom firmware. Gta San Andreas Psp Iso Download 200mb
For those looking to download the PSP ISO version, the 200mb file size is remarkably compact, making it an attractive option for those with limited storage or slower internet connections. However, ensure you're downloading from a reputable source to avoid any potential malware or corrupted files. There are community-driven efforts to bring San Andreas