Websites selling "GTA 4" PS2 discs often explicitly note that it's a modded San Andreas . This is the reality behind most search results.
Always download games from official sources like Steam or the PlayStation Store. If you want to experience Liberty City in its full, uncompressed glory, play the PC version or the original console releases. Gta4 Ps2 Iso Highly Compressed
I wasn't convinced, but I decided to give him the benefit of the doubt. I asked him if he had any patches or fixes for the game, and he sent me a link to a updated version of the ISO. I downloaded it, and this time, the game ran smoothly. Websites selling "GTA 4" PS2 discs often explicitly