Titan
Titan is the tanky class that wears heavy armor. Titan is divided into 2 subclasses, the Striker and the Defender.
Hunter
Hunter is the agile class that strikes with speed and precision. Hunter is divided into 2 subclasses, the Gunslinger and the Bladedancer.
Warlock
Warlock is the spell-casting class with both offensive and defensive AoE prowess. Warlock is divided into 2 subclasses, the Voidwalker and the Firesinger.