Being an action RPG modelled on Diablo II, Hellgate: London features no designated tank, healer, or dps classes.

As published in the May 2007 issue of PC Gamer, there are six classes in Hellgate: London, divided equally among the three factions in the game. The factions, "Cabalist", "Templar" and "Hunter" represent the different approaches towards the demon invasion.Templars are holy knights in shining armour, and hunters are high tech soldiers. All characters of a given faction share the same graphics, quests, storyline and some generic character skills.