Based on ancient mythologies, the story follows Kratos, a Spartan warrior and later the Greek God of War, who was tricked into killing his family by his former master, the original Greek God of War Ares. It began in 2005 on the PlayStation 2 (PS2) video game console and has become a flagship series for PlayStation, consisting of nine installments across multiple platforms. God of War is an action-adventure game franchise created by David Jaffe at Sony's Santa Monica Studio.