: Many of these files are actually GTA: Vice City Stories or Liberty City Stories with modified textures to make the characters or vehicles look like those from San Andreas.
Since San Andreas isn't native, you can play these official GTA titles designed specifically for the PSP: how to play gta san andreas on psp link
For years, the internet has been flooded with fake tutorials and "download links" for GTA San Andreas on PSP. : Many of these files are actually GTA: