There is of Grand Theft Auto: San Andreas released for the PlayStation Portable. Rockstar Games released two original titles for the PSP:

An is the standard file format used by the PSP for digital software, including official firmware updates, homebrew applications, and PlayStation 1 (PSX) games converted for handheld play. Because San Andreas was never released on PSX (it was a PS2-era title), a genuine "PSX-to-PSP" EBOOT of the game is technically impossible.

or a map replacement), the installation generally follows this structure: Preparation : Ensure your PSP has Custom Firmware (CFW) installed. File Placement

Disclaimer: This report is for informational purposes only and does not endorse the illegal downloading of copyrighted software or the modification of hardware.