you must be prepared for:
The original game was designed for dual-layer discs (DVD9), making it twice the size of standard PS2 games. God of War 2 - A Retrospective god of war 2 iso ps2 highly compressed
In your emulator, navigate to the folder where you extracted the ISO and select it to start playing. Why Compression Matters Original PS2 discs for God of War 2 were often dual-layer (DVD-9) you must be prepared for: The original game