You can find various 100% completed and "fixed" save files (files designed to work specifically with the BCUS98111 ID) on these community-trusted platforms:
: Offers multiple ZIP files, including "Everything Unlocked" saves by users like Sakuragi88. download save game god of war 3 bcus98111 fixed
: Open your RPCS3 folder and navigate to dev_hdd0\home\00000001\savedata . You can find various 100% completed and "fixed"