In the series, Kratos embarks on a series of often forced adventures in attempts to avert disaster or to change his fate. He is usually portrayed as being oblivious to all else, often engaging in morally ambiguous activities and performing acts of extreme violence. He is a Spartan warrior eventually revealed to be a demigod and becomes the God of War. Each adventure forms part of a saga with vengeance as a central theme, providing additional information about Kratos' origins and his relationships with his family and the gods.