Since Rockstar Games never developed San Andreas for the PSP, the file hosted on sites like Ristechy is almost certainly not San Andreas.

In 90% of cases, these files are "bait and switch" downloads. When you download and launch the ISO, you will likely encounter one of two things:

Downloading "Highly Compressed" ISOs from third-party file lockers (the links provided by sites like Ristechy) carries risks:


Searching "Ristechy" leads to websites hosting custom firmware tools and modified ISO files. These are typically:

None of these are legitimate. Many "Ristechy" links are dead or redirect to ad-filled survey scams.

Warning: Downloading ISO files from unknown sources is a leading cause of PSP bricks (permanent console damage) and identity theft via keyloggers.