Acts

In Act I: Challenge of the Elements, you will fight elements. You start fighting the Stone Golem as your first boss. Then, later on, you start fighting other elements such as: Fire, Water, Air, Demonologist, Host of Elements, Guardian of Earth, Life, and Ballgur.

In Act II: Challenge of the Titans, you will fight titans. There are nine different bosses (or titans) just like the previous act. Each one getting more difficult. The first boss is the Titan of Rage. The order after the first titan are as followed: Destruction, Magic, Exiled, Retribution, Death, Gorus Stormborn, Arheymus Stormborn, and Supreme.

There may be a third act, but we don't know that yet.