From Wikipedia: Thor battles through the numerous worlds of Norse mythology to save Asgard. Players wield the iconic Mjölnir, Thor's legendary hammer, to fight enemies of an immense scale while controlling the elemental storm powers of lightning, thunder and wind to vanquish enemies. Thor must overcome monstrous foes lifted from the pages of the comics, including Ulik, Ymir and Surtur as well as other daunting enemies. There are also a variety of collectibles to be found and collected, including Runes, Concept Arts, and alternate Thor costumes.[4]