No ethical "repack" will compress a 16GB game into 500MB. At best, a repack removes audio languages and movies, saving 3-4GB, but it will never fit on a CD-ROM.
However, if you are looking for a legitimate copy of for the PlayStation 2, there is a hard truth you need to know: It does not exist. gta4 ps2 iso highly compressed repack
clarify that even the PS3 struggled with the vanilla version, making a PS2 version technically unfeasible without massive compromises that would render it a different game. Official Release History According to the No ethical "repack" will compress a 16GB game into 500MB
Because the original hardware is incapable of running GTA IV's high-resolution textures and complex physics, the "ISO" files found online are typically one of two things: GTA IV Legacy PS2 - ISO DOWNLOAD ‼️ clarify that even the PS3 struggled with the