Striker Titan: Close quarters combat specialist Defender Titan: Damage soaking Tank Gunslinger Hunter: mid to long range damage dealer Bladedancer Hunter: Stealthy, Close Quarters combat specialist Voidwalker Warlock: Mobile Glass Cannon - focus on its Special -Nova bomb Sunslnger Warlock: ally support, focus on burning everything to cinders, has self revive (will most likely be rarely used by players) 6 classes each uniquely different expect to find gear that works for certain sub-classes, for instance the titan helm in the video gave the Striker Titan, Death From Above as a special free ability, the Defender Titan would gain no bonus from that effect as he does not have access to Death From Above