Kratos returns in God of War: Ascension. A prequel to the entire series–yes, even Chains of Olympus—Ascension follows Kratos on his journey to break free from his oath to Ares.
According to Sony’s PlayStation blog:
We’re thrilled to unleash our God of War: Ascension single-player demo to ALL PlayStation Network users later today. Become Kratos and escape the epic Prison of the Damned. God of War: Ascension’s demo will allow players to explore and master the legendary Spartan’s new advanced combat.
You can read more here: http://blog.us.playstation.com/2013/02/26/god-of-war-ascension-single-player-demo-on-psn-today/