WP - "Thor: The Dark World is the second take on the Thor comics to come out for the iPhone, iPad, and Android. It's also Gameloft's second take on the Thor universe. There are three types of currency in this game. Runes are the primary currency of this game, long ISO–8 is the secondary currency of the game. URU is the premium currency of the game, and is by far the rarest of them all; however, it is possible to get all three of them within the game itself."