"The Adeptus Mechanicus are the custodians of all Imperial technology". From the red planet of Mars, they maintain a parallel empire that venerates the Emperor in His guise of the Omnissiah. Their beliefs grant technology a mystic power that must be respected and maintained with prayer, ritual, and careful rites. In their worship of the Machine God, the Tech-Priests try to become more like their divine master. Their elders are more machine than man, with even the majority of their brains replaced by cold logic circuitry and whirring cogitators. This is the ultimate ambition of any "true devotee" of the Machine Cult: to rise through the ranks of the Tech-Priesthood to become a Magos of the order, replete with metal skin and an iron heart.
The Mechanicum is also the keeper of the greatest weapons known to Mankind. Foremost among these are the war engines of theCollegia Titanicus, the Titan Legions. Towering humanoid battle engines standing as tall as a hab-block and carrying weapons capable of levelling entire hives, Titans are only deployed against the direst of foes. Each is an ancient and sacred piece of technology, venerated as a walking expression of the Omnissiah’s might. The Mechanicum also controls other deadly weaponry, including virus bombs and vortex torpedoes that can only be fabricated and deployed with its help. To this end, Tech-Priests can be found in all Imperial organisations. Even the otherwise proudly self-sufficient Adeptus Astartes send Battle-Brothers to Mars for training in the secret ways of the machine. These Techmarines then return to their Chapter and use their knowledge to maintain its arsenals.
There is little, if any, innovation or progress within the Imperium; the principles of power systems, weapons, and voidships are all based on designs and patterns often thousands of years old. This is in part because of "the dangers such rampant technological advancement has brought down upon Mankind in the past", when legends tell of thinking machines and terrible planet-killing weapons that wrought havoc upon the galaxy. It is also because of the Adeptus Mechanicus itself. Every major Imperial organisation is oath-bound to the Cult Mechanicus, which "closely guards the secrets of technology; even the most powerful of rulers must defer to the Mechanicum in matters of technology". Tech-Priests rule over worlds, have their own fleets, and even raise their own military forces to protect their manufactorums and research outposts.
Those who serve the Machine Cult are often obsessed with technology, seeing the divine glory of the Omnissiah in every circuit and rivet and treating the operation and care of such devices as a sacred duty. Their very appearance sets them apart; even in an Imperium where cybernetics are not uncommon, their heavily augmented bodies are nearly inhuman. Many even "choose" to strip away healthy flesh and replace it with bionics to the point where they no longer see themselves as human, but rather as something that has "transcended mortal bonds". Their mental processes are also "augmented", with emotional responses edited or removed altogether and leaving many incapable of normal human interactions.
The result is often a contempt for the bulk of Mankind, seen as the wasteful by-product of evolution and an inefficient component in the divine precision of the Machine God. For the most part, the rest of the Imperium is content to allow the Mechanicum its mastery over their technology, raised to accept that "the secrets of the machine are for it and it alone", though this does breed an aura of distrust.
Adeptus Mechanicus Characters
From the depths of the Imperium’s greatest cities to the engine rooms of its grand interstellar navy, it is the duty of the Adeptus Mechanicus to "preserve and maintain the great technological works of man". Once a Tech-Priest has been trained and taken their oaths to the Omnissiah, they are dispatched to tend to some part of these great works, spending their years intoning the sacred prayers and rituals that keep a machine’s spirit alive and functioning. Some move beyond these simple processes of maintenance, rising in the ranks of the order to take on more responsibility or expertise. Others aid war efforts directly as Enginseers for the Imperial Guard . They may rule one of the many forge worlds, vital to feeding the Imperium’s insatiable appetite for war machines and other materiel. They could also serve as part of an Explorator Fleet in the holy quest for legendary Standard Template Constructs dating to the pre-Imperial Dark Age of Technology. Equally, they might engage in xenos research on the foes of the Imperium, such as the voracious Tyranids or the brutal Orks. A few might command their own outposts and stations, becoming lords of their own domains and devoting their long lives to the personal pursuit of technological mastery.
Others, such as forge labourers or adept minions, have lesser functions. Most aspire to one day join the Tech-Priesthood, so that they may "better
serve the Omnissiah". "Rarely", some might reject the Machine God and seek lives elsewhere, but still retain more skills and familiarity with technology than almost anyone else in the Imperium. "Many within the Cult Mechanicus aspire to become as close to the Machine God as possible", slowly enhancing their bodies with mechanical components until they are more metal than flesh. This can make them devoid of emotion, as they embrace the cold logic of the Machine God they serve, and sometimes put them at odds with others around them. Just as it relies on psykers, the Imperium could not function without the presence of the Adeptus Mechanicus, and whether its citizens favour a servant of the Omnissiah or merely tolerate him, they "could not survive" without their knowledge and skills.