While "highly compressed" 200MB ISO files for God of War II are widely searched for, it is important to understand what they actually are. The original God of War II for PS2 was massive for its time, released on a with a file size of approximately 7.9 GB . What "200MB Highly Compressed" Files Really Are
PCSX2 is the go-to emulator for playing PS2 games on PC. It's open-source, under active development, and provides the most reliable and compatible experience.
You can compress the game's code (the "logic") to about 150MB. The rest is art, music, and video. A 200MB rip usually means: