What you have actually downloaded is almost certainly a or a Technical Demo , not the full game. There are two common versions of this "100 MB Myth":
Technical Research Unit Date: [Current Date] Subject: Feasibility, Legality, and Security of Alleged 100 MB Repack gta san andreas ppsspp zip file download 100 mb repack
Achieving a 100MB file size for a game that originally occupies over 2GB involves aggressive data reduction: Audio Ripping: What you have actually downloaded is almost certainly
GTA San Andreas PPSSPP Zip File Download: 100MB Repack Guide gta san andreas ppsspp zip file download 100 mb repack