Smash Up gave the reins to the the player for this one! Through a huge voting and elimination process, players from all over the world helped choose the four factions that will take part in Smash Up: It's Your Fault! And the winning four factions making an apperance are Sharks, Superheroes, Greek Myth, and Dragons.
Don't just take our word for it! Check out this review of Smash Up: It's Your Fault.