Press "System" > "Boot ISO (Fast)."
You must provide a legal BIOS file from a PlayStation 2 console to boot the game. God Of War 2 Highly Compressed Iso Download
If you manage to set up the game, you can use these cheats to skip the grind: Unlock Everything : On the main menu, use a second controller to enter: to instantly unlock all costumes and treasures. Max Upgrades Press "System" > "Boot ISO (Fast)