Editing Adeptus Mechanicus (section)

===8th Edition was nice enough to flesh out several back-canon Forge Worlds as well:===
* '''Triplex Phall''': Isolated, on the far east side of the galaxy, Triplex Phall has recovered a ton of STC and Archeotech but refused to give it to Mars. Basically AdMech Protestants. Mars now has a Skitarii Legion following them around with express instructions to warn Mars if Triplex Phall forces find anymore secret tech. Invaded by Hive Fleet Kraken, attacked by Typhus, and invaded by Daemons. We can only imagine the only reason the rest of the Mechanicus hasn't crushed them and taken their stuff is either the STCs are that potent or that the Machine Cult would rather space Protestants have it than to risk the data being damaged or destroyed. Or their STC data is useless junk important solely for religious purposes but not worth bothering with in the practical. Or the AdMech already stole it as it is extremely doubtful that Triplex Phall has the data to avoid however Mars has learned to enforce its will over the last ten thousand years (and the Inquisition's help, probably). That, or the daemons corrupted everything or Mars fears they have.
* '''Deimos''': The moon of Mars, gifted to the [[Grey Knights]] of [[Titan]] at the end of the Horus Heresy. Originally responsible for building the favored patterns of [[Rhino]] and [[Predator]] during the Great Crusade, they now make Grey Knight wargear and use Servitors to transfer the material between the Grey Knights and Deimos, mindscrubbing them at each end, allowing both organizations to keep their secrets. Deimos has ''three'' different Knight houses, because apparently the Grey Knights aren't enough knights for Deimos. Considering Deimos is about 10 miles across they are probably miniature knights, Epic Scale if you will.
* '''Voss Prime''': The most Mars-fanboyish of the Mars Fanboys, has a focus on Legio Cybernetica robots. Closest Forge World to Armageddon. Voss has a huge asteroid field that repelled an Ork [[Waaagh]] merely on accident. Known for good tanks, but crappy plasma weapons. Not to be confused with Voss, which is another Forge World not too far away from Voss Prime. During the [[Great Crusade]] they made enough [[lasgun]]s to ''arm the entire [[Solar Auxilia]] with''. Builds weird ships the Imperial Navy didn't ask for, like slow light cruisers and frigates with torpedos. Also, either Voss or Voss Prime builds ships double the size they normally are. Which makes for utterly terrifying monsters of the stars. Imagine a Retribution or Apocalypse or Emperor=class that's ''double sized''.
* '''Gryphonne IV''': The lost Forge world. They are responsible for a lot of Imperial Guard support-tank patterns, thanks to the real-life [[Forge_World#Company|Forge World]]. The Tyranids ate their planet after they refused to listen to Inquisitor Kryptman, so they have become the first nomadic Forge "World": a space fleet actively seeking out a planet they can terraform into a new Mars. Whether or not Gryphonnians want to terraform said world into (degenerate-biome barren world) present-day Mars, or a (lush and properly-terraformed) Dark Age of Technology Mars is anyone's guess. Gryphonne IV is ''definitely not'' [[Craftworld|copying anything]]. Bet they won't hesitate to listen when Inquisition experts tell them shit's about to go down next time.

The "big" Forge World remains Mars, with [[Cawl]] being the only unique character in the AdMech force. (Hieronomus Tezla says hello.) Lucius and either Metalica or Ryza (depending on the edition) round out the "main three" Forge Worlds, fluff wise.

However, each world has their own rules and details in the fluff, although the new ones remain somewhat intentionally vague for [[your dudes]] purposes -- Triplex Phall lends itself to odd conversions because "It's Archeotech!"; Deimos lends itself to borrowing some Grey Knights aesthetic and allies; Gryphonne IV being nomadic lends itself to battle damage and the like. Even the "old" forge worlds get some additional flavor in the new fluff -- Stygies VIII lends itself well to sneaky types or Xenos conversions and allies; Agripinaa force-conscripting refugees encourages Servitors / Skitarii converted from Imperial Guard (or even Ecclesiarchy and Necromunda). Metalica going on a ''fucking safari'' for Hive Fleet Leviathan splinter fleets just screams "Nid Hunter" Skitarii.