The idea of Grand Theft Auto: San Andreas on the PSP (PlayStation Portable) was the ultimate "what if" for handheld gaming in the mid-2000s. While technical limitations kept the full map from appearing on the handheld, we can imagine a "PSP-exclusive" feature that would have made it legendary.

Useful resources to consult

A dedicated group of developers has been working on a custom port for the original PSP. It is a work-in-progress and may have stability issues on older models like the PSP-1000 due to RAM limitations.

Part 4: Does "GTA SA for PSP UPD" Actually Work?

If you are looking for an official GTA experience on your handheld, there are three titles specifically optimized for the PSP: GTA: Liberty City Stories

Genuine Progress:

The VK-based Project Unfrozen is the most credible effort to bring the physical Los Santos map to a real PSP.