“Highly compressed PS2 ISO” files are not worth the trouble . The space savings are often misleading (they expand back to full size), quality may be ruined, and legal/malware risks are high.

A PS2 ISO is a complete disc image of a PlayStation 2 game. A highly compressed version means the file has been reduced in size—often from 4.7 GB (DVD) or less for CD-based games down to anywhere from 100 MB to 700 MB —using formats like ZIP, RAR, 7Z , or specialized repacking tools.