This is the most popular route. If you own a physical copy of the game, you can rip the files and play them via the RPCS3 (PS3 emulator). It requires a beefy CPU, but it allows for 4K resolution and 60 FPS gameplay.
Why "God of War 3 PC Free Download" Links are Usually Scams If you’re searching for a way to play on your PC, you’ve likely seen dozens of sites promising a "Free Download" or a "PC Port." Before you click that download button, there is some fine print you need to know about the status of this PlayStation classic. Is there an official God of War 3 PC port? God of War 3 PC Free Download
You’ll be asked to complete endless surveys to "unlock" a password that doesn't exist. This is the most popular route
Sony allows you to stream God of War III Remastered to your PC through their cloud gaming service. You’ll need a subscription and a compatible controller, but no high-end hardware is required. Why "God of War 3 PC Free Download"