Kratos is haunted by visions of his mortal life, particularly of his mother, who is hidden away in the city of Atlantis. Kratos has ascended to Olympus as the replacement God of War since the previous one, Ares, was killed at his hands. Ghost of Sparta opens not long after the end of the first God of War ended. The end result may not be the most satisfying for fans who expect something dramatic and shocking, but answers are answers, and it is as good an excuse as any for more God of War gameplay.
God of War: Ghost of Sparta for the PSP seems to have been birthed to clear up some of those lingering unused ideas. None of these plots came to pass, and the second game in the series was quite different, but these plot threads continued to linger through later games in the series. Our only hints were a series of unlockable videos, which depicted three possible scenarios for future plots: Kratos discovering his father's identity from his mother, the remains of the Titan Cronos being discovered by a modern day excavation team, and the return of Kratos' long-lost twin brother, who was thought to be dead.
When the first God of War came out, we didn't know what the franchise would become and where it would go.