Traitor Titan Legions - Traitor Titan Orders: Many Titan Legions -- or "Titan Orders" as they are alternatively known -- can trace their legacy to the all-but-forgotten ages before the Emperor united Humanity and founded the Imperium of Man.Very little is known outside of the sealed archives of the Adeptus Mechanicus, but some within the Inquisition hold the Titans were first conceived so that rival Martian fortress-foundries could protect themselves from one another and from the ravening mutant hordes and feral, Warp-tainted automata that infested the red wastes of Mars during the dark millennia of the Age of Strife.If such claims are true, there is a grim irony in the fact that, even in the 41st Millennium, these mighty "god-engines" continue to wage war upon one another, unleashing weapons only accessible to the Tech-priests -- or former Tech-priests -- of the Cult Mechanicus.Each Titan Order was founded to defend one of the many Forge Worlds throughout the galaxy, though in truth not every Forge World had the requisite lore or resources to do so, while conversely, some were so blessed in this regard they could raise more than one Legio.As many Forge Worlds predate the Great Crusade, so many Titan Orders have pasts so obscured by the passage of time their deeds during the Age of Strife are matters of legend to all but the most senior of magi. Some Titan Orders were established as the Great Crusade swept ever outwards from Terra and the Mechanicum of old claimed ownership of those worlds that met their particular needs.Though expansion turned largely to stagnation during the Age of the Imperium, occasionally new Forge Worlds were founded, and some were able to raise their own Titan Legios in order to protect themselves and their interests against the numerous foes that haunt the void.The majority of the Traitor Titan Legions fell to the service of the Ruinous Powers during the calamitous age of the Horus Heresy, though a few more have fallen in the ten millennia since. The causes of their fall were as varied as those of the Traitor Marines, some being laid low by bitter hubris, others by malignant intent, and some by the vagaries of capricious fate.What accounts remain state that over half of the Titan Legions renounced their oaths to the Emperor and declared for the Warmaster Horus, and fought alongside the Traitors across the length and breadth of a galaxy torn apart by a civil war the likes of which had not been seen before.The Traitor Titan Orders were to share in the damnation of the Traitor Legiones Astartes, and while their names might not be as well-known or reviled as Traitor Legions such as the Sons of Horus, the World Eaters or the Death Guard, for many amongst the upper echelons of the Imperium they represent a force every bit as dangerous.Traitor Titan Orders such as the Legio Fureans -- colloquially known as the "Tiger Eyes," the Legio Vulcanum I -- so-called "Dark Fire," and the Legio Mortis -- the "Death's Heads" -- have caused untold devastation the length and breadth of the Imperium since the dark days of the Great Betrayal.Others have fallen since, including those known as the Adamant Fury and the Helldogs, suggesting to some that a new and unheralded doom is stalking the Imperium and warriors once counted amongst the most loyal prove themselves nothing more than base betrayers.The annals of the Imperium list numerous other Traitor Titan Orders, some not heard of for centuries and assumed extinct before returning to inflict death and misery upon the Imperium once more. Some are known only to legend -- such as the "Death Stalkers" and the "Flaming Skulls" -- but the wise refuse to count them as a spent force given the sheer number of foes arrayed against the Imperium of Man.