God of War III is an action-adventure hack and slash video game. It is the fifth installment in the God of War series, the seventh chronologically, and the sequel to 2007's God of War II. Loosely based on Greek mythology, the game is set in ancient Greece with vengeance as its central motif. The player controls the protagonist Kratos, the former God of War, after his betrayal at the hands of Zeus, King of the Olympian gods. Kratos ascends Mount Olympus, guided by Athena's spirit, Kratos battles monsters, gods, and Titans in a search for Pandora, without whom he cannot open Pandora's Box, defeat Zeus, and end the reign of the Olympian gods to have his revenge.