After killing Poseidon and Hades, therefore flooding the land and freeing souls from the Underworld, Kratos was ascending back up Olympus, making his way through the City of Olympia. It was calm so far; he hadn't encountered anyone else attempting to oppose his vengeance. The death of Zeus was all that mattered to him.

The Ghost of Sparta noticed you as he passed by, but he paid little attention to you. It's not like he was one to be messed with, anyway.