If you search for "God of War 2 PC" on Softonic’s official website, you will find a direct download. Sony has never released an official PC port of the original "God of War 2" (unlike the 2018 reboot and Ragnarök, which are on PC via Steam).
Before downloading God of War 2 on PC, make sure your system meets the minimum system requirements: god of war 2 pc game free download softonic
If you own a physical copy of "God of War 2" for PS2, you can legally: If you search for "God of War 2