The emulator requires the original PlayStation 3 system software to run games. This is how you play God of War 3 on PC - RPCS3 Guide
RPCS3 has a community patch system to fix game-specific issues. how to install god of war 3 on pc
Q: Can I play God of War 3 on a low-end PC? A: While God of War 3 can be played on lower-end PCs via PlayStation Now, a more powerful PC is required for a smooth gaming experience when purchasing and downloading the game directly. The emulator requires the original PlayStation 3 system