The idea is tempting. Imagine downloading the massive open-world game of Los Santos — usually around 2-3 GB — in just 15 MB. It sounds like a miracle of compression. But is it real?

GTA San Andreas 15 MB Download for PPSSPP: The Ultimate Highly Compressed Guide

The original PlayStation 2 version is roughly 4.7 GB. The PSP version (GTA: Liberty City Stories & Vice City Stories) runs about 1.5 GB. Even the mobile port by Rockstar is around 2.6 GB. A 15 MB file is smaller than a single MP3 song.