If you see a "High Compressed PS2" file for God of War 3 that is under 1GB, it is either a virus or a completely different game.
The original PS2 hardware, while revolutionary, was already pushed to its absolute limits by God of War II in 2007. Developers at the time noted that the advanced lighting, massive boss textures (like the Poseidon battle), and sheer scale of God of War III required the superior processing power and Blu-ray capacity (roughly 35GB) of the PS3. What You Are Likely Finding god of war 3 ps2 iso highly compressed work
The PS2 hardware simply cannot run God of War 3. The game was designed to leverage the PS3’s Blu-ray drive and the powerful Cell processor to render massive scale (like the opening battle on Gaia’s back). The PS2 uses DVD-ROMs (4.7 GB) and has only 32 MB of RAM, while God of War 3 requires over 30 GB of storage and 256 MB of RAM. If you see a "High Compressed PS2" file
Check for any recent changes in the game's availability. As of now, the original PS2 version isn't available on PlayStation Store, I think. What You Are Likely Finding The PS2 hardware
: The original PS3 version uses approximately 35 GB on a Blu-ray disc. A standard PS2 DVD only holds 4.7 GB to 8.5 GB , making it impossible to "highly compress" the assets to fit or function on a PS2. ⚠️ Risks of "Highly Compressed" ISO Downloads