Titan - God-engines of the Mechanicus: The first Titans were built during the Age of Strife on Mars, as a way for the newborn religion of the Cult Mechanicus and its Mechanicum government (the ancient, pre-Horus Heresy predecessor of the Adeptus Mechanicus) to effectively fight its enemies in the raging wars to reclaim the Red Planet's irradiated surface from feral mutants and insane thinking machines. After Mars had been secured by the Tech-priests, the Titans later accompanied the early Mechanicum colonial fleets sent blindly through the Warp from Mars that established the first Forge Worlds, leading to the creation of the Titan Legions -- armed forces made up entirely of Titans specific to that Forge World.Most Titans stand between 15 and 60 metres (about 50 to 196 feet) tall, though the extremely powerful and very rare Emperor Titans can stand up to 150 metres (492 feet) in height. There are a variety of different classes that a Titan can belong to, but all Titan Legions ultimately serve the division of the Adeptus Mechanicus called the Collegia Titanica.Most Titan classes belong to one of three separate physical grades arranged by size and combat strength -- Scout Titans, Battle Titans and the largest and most powerful, the Emperor Titans. Scout Titans include many smaller, more mobile classes of the great war engines which are used for reconnaissance and infantry fire support missions by most Titan Legions. The Battle Titans are the most commonly deployed classes of Titan and provide the backbone of any Titan Legion's strength. The rare Emperor Titans are the true kings of the battlefield in the Warhammer 40,000 universe, and the two classes of these Titans are used to provide a Titan Legion's primary offensive and defensive power.Due to their importance and high standing in the Imperium as a result of the advanced technology used in their creation, all Titans are important enough to be given their own High Gothic names when built. This is represented by giving each a two-word High Gothic name, always some venerated title or concept, usually from the creed of the Imperial Cult.Examples include Aquila Ignis, Regalis Annihilatus, Vitas Falco, Imperius Eradicus, Imperius Belladon, Apocalyptus Credo, Imperius Brontos, Imperius Excelsior, Dies Irae, Octimus Ligus, Imperius Augusta and Imperius Dominatus. Similarly, the loss of a Titan is considered tragic and mourned openly by the Forge World that produced it.Imperial Titans are unique in the sense that their computer mind-cores or "Machine Spirits" in the lexicon of the Mechanicus are sentient and even self-aware, albeit in a highly-erratic manner. This is in contrast with the usually non-sentient "Machine Spirits" or onboard computer systems found in many other Imperial war machines like tanks and armored vehicles.In the "Titan" comic, the newly connected princeps was formally greeted by the Titan Imperius Dictatio inside its mental landscape; there was also the Titan Laudator Magnificat, which was forcibly reactivated after falling in combat. This proved disastrous: the god-engine's mind-core had suffered severe psychological trauma from its "death," and began attacking everything in sight in its mindless rage.Most Imperial Titans are roughly humanoid in shape, but with thick lower legs, a hunched head, and an oversized torso. Forward-oriented main weapons mount directly into where the arms would be, and additional weapons are often found on the chassis. These configurations (called "patterns") vary, and most Titans are built on these precepts.However the actual design of the chassis can vary greatly, so only the absolutely basic features (such as leg joints and weapon hardpoints) are constant. This is most evident in the Warhound-class Titans (the Lucius Pattern looks more geometric and broader than the Mars Pattern, the form of which is more rounded and animalistic).