Guide:How to make an Adeptus Mechanicus order

Who are the Adeptus Mechanicus?
The Adeptus Mechanicus is one of the three main bodies responcible for the upkeep of the Imperium. The purpose of the Adeptus Mechanicus is the upkeep and protection of the holy machines of the Imperium, however the AdMech typically acts as the main center of production and occasional research. As such the Adeptus Mechanicus is a military power of it's own with it's own independent forces.

Key things to remember when writing for the Adeptus Mechanicus are.
 * They worship the Omnissiah or "Machine God" whom the Emperor has claimed to be, but they do not actually worship the Emperor himself
 * They do not permit the creation of new technology, the modification of existing Technological Schematics also must be done by a ordained Tech Preist
 * They do not tolerate others using, possessing, or developing advanced technology without their supervision/approval
 * They in one form or another control all means of production within the Imperium

The Ranks of the Adeptus Mechanicus
Perhaps the most unknown portion of the AdMech's lore that 40K fans know the least about is the ranking system of the AdMech. During my time on the 40K fanon i've seen a number of rankings that have been made up or incorrectly placed despite the Adeptus Mechanicus having a set organisation. you can find the Hierarchy of the AdMech here- http://warhammer40k.wikia.com/wiki/Adeptus_Mechanicus#Adeptus_Mechanicus_Hierarchy

Ranks of Note

 * Magos: Essentially the Specialist Career field of the Adeptus Mechanicus, this is the highest Canon friendly rank any member of any Fanon Order can achieve. Each Magos is a specialist in a certain feild be it the Magos Juris who have given up research and production for the sake of seeking out and destroying Tech-heresy, the Magos Errant who specialize in a variety of feilds and work in union with Rogue Traders or with other Imperial Expaditions to ensure their allies keep with the Machine God's will, or the Magos Exploritors who head the AdMech's Explorer Fleets seeking out STC's and other such relics for the AdMech.
 * Engineseer: Due to the Treaties that bind the Adeptus Mechanicus to the Imperium the Engineseers are sent out to serve with the Imperial guard or Imperial Navy maintaining the Machines of these military force and seeing that the Machine spirits and the Omnissiah are keep apeased.

STC's
Standard Template Construct (STC) systems were advanced, artificially intelligent computers created during the Dark age of Technology which are said to have contained the sum total of human scientific and technological knowledge. The STC was invented when human interstellar civilisation was at its technological peak. Introduced during the Dark Age of Technology before the Age of Strife, an STC allowed workers to build anything from a Lasgun to a fortified bunker or the fearsome interstellar warships now used by the Imperial Navy. STC systems possessed the ability to not just store information but also to produce new designs to meet changing circumstances. Imperial forces (especially those of the Adeptus Mechanicus) will go to any length to recover a lost or stolen STC, even if it means the deaths of hundreds of thousands of Imperial citizens. It is said that even the flimsiest rumors of an STC system will spark cross-galaxy journeys, titanic fleet search operations, and the spending of untold lives and treasure. What technological knowledge remains from the Dark Age of Technology survives only in the form of STC hard-copies that have been preserved and copied over thousands of years by the Tech-Priests of the Adeptus Mechanicus, who believe that STCs are the most holy of artefacts

What this means to you
 * You can not just have a STC!
 * Everything in the Imperium falls back to a STC design
 * The AdMech will fight over anything that has a relation to a STC

Forge Worlds
Alright now for the most used, abused, confused and saught after portion of the lore concerning the Adeptus Mechanicus. Forge-Worlds are worlds directly controlled by the Adeptus Mechanicus and as such are under the protection and watch of the Tech-priests of Mars. Forge worlds are key locations of production within the Imperium of Man producing the majority of Imperial arms and the loss of a single Forge-World could be considered a severe blow to the Imperium as only certain Forge-Worlds posses the rights to produce certain models of weaponry for the Imperium. (The Vanquisher Cannon is a perfect example of this as the design was nearly lost when it's orriginal Forge-World of orrigin was destroyed)

As such Forge worlds are each heavily guarded. Not only does the Imperial Navy keep a strong pressence near these worlds but the Adeptus Mechanicus also place a heavy military presence of their own on these worlds, while ensuring that no military force belonging to any of the other human factions can place their own power upon these Adeptus Mechanicus controlled worlds.

What this means to writers on this site:
 * No Space Marine Chapters may settle on a Forge-World
 * No Guard Regiment may come from a Forge-world
 * No major technology may be produced by any other world (I.E. Titans, baneblades, Plasma-guns, power-swords)

Adeptus Mechanicus Military forces
What is unknown to most casual Warhammer 40K fans is that the Adeptus Mechanicus maintain their own extensive military forces. Ranging from the "simple" Skitarii to the famus Titan Legions, to the advanced and mysterious Ordo Reductor. Each of these military forces is tied directly to the Machine cult and as such recieve the blessings of the Adeptus Mechanicus receiving the best of their technological support and in some cases access to the use of Archeotech weapons.

military forces in order of unit scale and rarity
 * Skitarii
 * Ordo Reductor
 * Legio Cybernetica
 * The Knight Houses
 * Titans

Relations with other factions in the Imperium
The Adeptus Mechanicus have by treaty and by logical need for their technological skills deep seated relations with every Imperial Sub-Faction within the Imperium of Man. By Treaty or by Logical need (often both) the AdMech supports nearly every military action throughout the Imperium through various means.
 * The Imperial Navy: extending to not only the Imperial Navy but to every Imperial vessel in the 40K Universe the Adeptus Mechanicus oversees the production, and maintenance (both on board and in dock) of every vessel within the Imperium of Man. As such there will typically be several Tech-Priests aboard any givin Imperial vessel.
 * The Imperial Guard: Overseeing the weapons production of, and tending to the field maintenance for the Imperial Guard is one of tasks the Adeptus Mechanicus have undertaken. As mentioned before the Forge-World of the Mechanicus control nearly all the Imperium's weapon production and as such this determines the armaments of the Imperial Guard and means that the Engineseers of the Adeptus Mechanicus are needed to ensure proper maintenance is applied to the guards various machines.
 * The Space Marines: while relations with a Space Marine Chapter is typically a more case by case basis, the Adeptus Mechanicus is required to train the Tech-Marine Asperants of the Space Marines in the ways of the Machine Cult and to ensure that these Marines properly serve the Omnissiah. Also the Adeptus Mechanicus is also responcible for the production of new gene-seed required by the Space Marines to create new battle brothers.
 * The Ecclesiarchy: the AdMech and the Ecclesiarch get along as well as any two completely diffrent religions do, however as the AdMech needs the rest of the Emperor Worshiping Imperium and the Ecclesiarchy need the Adeptus Mechanicus technology the two try to keep on relatively peaceful terms.

The Dark Mechanicus
The Chaotic counterpart to the Adeptus Mechanicus. the Dark Mechanicus perform a similar role to the Admech within the ranks of chaos. However unlike their loyalist counterparts the Dark Mechanicus no longer serve the Omnissiah (or at least not in the same manner) and as such are unbound in their pursuit of new technology or ideas. Forge-worlds owned by the Dark Mechanicus are daemon worlds in of themselves ruled by Arch-Hereteks, while some Hereteks serve along side the traitor legions maintaining Chaos corrupted titans and other war weapons.