The first boss battle takes place within the first 30 minutes. There are a lot of them-there are a lot of gods-in this action-adventure game that was released on March 16. Each fight with a god is a boss battle in God of War III (Sony PS3 rated mature). But first he has to work his way through the rest of the Greek pantheon. Kratos, who has been the god of war since killing Ares in the first game, aims to kill Zeus, his father. God of War III begins with a bang exactly where the second game in the trilogy ends: with Kratos, the protagonist, on the shoulder of Gaia as the Titans assault Mount Olympus.