God of War is a mythology-based action-adventure video game franchise. Created by David Jaffe at Sony's Santa Monica Studio, the series debuted in 2005 on the PlayStation 2 (PS2) video game console, and has become a flagship title for the PlayStation brand, consisting of eight games across multiple platforms. The story is about Kratos, a Spartan warrior tricked into killing his wife and daughter by his former master, the Greek God of War Ares. Kratos kills Ares and becomes the new God of War, but is still haunted by the nightmares of his past. Revealed to be the son of Zeus, who later betrays Kratos, the Spartan then seeks revenge against the Olympian gods for their machinations. After destroying the Greek pantheon, Kratos ends up in the world of the Norse gods. He and his young son, Atreus, set out on a journey to fulfill his recently deceased second wife's last wish, which is to spread her ashes at the highest peak of the nine realms.