While "highly compressed" God of War II files (often advertised as small as 200MB) are widely searched for, they are often malicious or non-functional
Based on technical standards and user feedback for emulating on PC, The Game: A Masterpiece in Action
To reach extreme compression, "ripkits" often remove essential game data like FMV cutscenes, music, or high-quality textures.
PCSX2 supports .iso , .gz , and the newer .chd format, which provides lossless compression that saves space without stripping game content. System Requirements for Smooth Gameplay
What I can do is explain what such a feature usually means in the context of compressed PS2 ISOs for emulators (like PCSX2), and how people generally verify them:
: Many sites promising "100% working" highly compressed files are clickbait and may contain viruses rather than the game.