The Imperator-class Titan is the largest and most powerful type of Battle Titan ever deployed by the Titan Legions of the Adeptus Mechanicus. It is literally a walking fortress and is armed with much more firepower than the next Battle Titan in size, the smaller Warlord-class Titan. An Imperator-class Titan is one of the two classes of super-heavy Titans known as Emperor Titans that also includes the even more rarely deployed Warmonger-class Titan. The Imperator-class Emperor Titan is a general-purpose assault platform, whereas the Warmonger-class Emperor Titan is a dedicated fire-support unit with more advanced fire control and targeting systems intended to aid its more specialised function. Both classes of Emperor Titan represent the most powerful mobile weapon systems in the arsenal of the Imperium of Man and are often unmatched by any force deployed by the enemy. Emperor Titans are extremely rare in the Imperium as the Adeptus Mechanicus has lost the capability to manufacture these monstrous war engines. Due to their immense size, Imperator Titans are not nearly as fast or agile as their smaller Scout and Battle Titan counterparts, but they more than make up for this failing with their sheer firepower and heavily armoured bulk. The Tech-priests of the Mechanicus consider the two classes of Emperor Titan to be avatars of the Machine God, walking incarnations of death intended to destroy all those who have displeased the others of the multiverse.