Editing Warhammer 40,000/Xenos in 30k (section)

== Other Codexes ==
=== Chaos Daemons ===
While the 40K Daemons list is perfectly suitable to ally in a 30k army of Word Bearers, ''Horus Heresy Book Eight: Malevolence'' actually did a bizarre thing: They released a new army called "Daemons of the Ruinstorm". This army, which represents the daemons as an unknown army of erratic xenoforms with no information, grants them a near-unprecedented degree of customization matched only by the Tyranids of 4th Edition while also making them very unique compared to the nineteen flavors of space marines and two flavors of guardsmen.

=== Chaos Space Marines ===
40k Chaos Space Marines don’t exactly fit well in 30k, thematically. That said, for rare pre-Heresy renegade Legiones Astartes, you do have a number of options: from Word Bearers, to Blackshields (''Horus Heresy Book Six: Retribution''), to ordinary Legion lists (possibly with Imperialis Militia & Cults as allies). You’re better off proxying Daemon Engines as regular 30k vehicles anyway, and if you love Chaos Spawn or Plague Zombies or Obliterators or whatever, maybe ally some proxied Mechanicum.

=== Khorne Daemonkin ===
Just play Word Bearers and ally Daemons, that’s close enough.

=== Renegades and Heretics ===
Just play the Imperialis Militia & Cults list (''Horus Heresy Book Five: Tempest''), it’s almost the same thing.

=== Tyrant’s Legion ===
Just pla– wait, seriously?

(Hey, we love the Tyrant’s Legion, but didn't you realize that you can just play a themed Army of Dark Compliance (''Horus Heresy Book Six: Retribution'') to cover this?)

=== Other Imperial Armies ===
Organizationally, nothing like them existed at this time at the kind of scale that compared with the Legiones Astartes. Even so, something like them probably existed on a small scale, so here is what you would usually proxy them as:

==== Adepta Sororitas ====
Adepta Sororitas models, in the sense of being some kind of band of elite Emperor-worshipping space missionaries in power armor, can be represented by the Solar Auxilia list (''Horus Heresy Book Four: Conquest''). They wouldn't have access to Heresy exclusive weapons like Volkite weaponry, Raipers, nor would they have Leman Russ, Malcador, or Baneblade variants. Arco-flagellants make decent stand-ins for Ogryn Charonites and Celestians make good stand-ins for Veletarii. While Penitent Engines could fill in for the Castellax, this would require having a Enginseer with a Cortex Controller to avoid becoming [[That Guy]]. Better yet, you could use Talons of the Emperor (''Horus HEresy Book Seven: Inferno'') and use the models to represent the Sisters of Silence.

==== Grey Knights/Legion of the Damned ====
Grey Knights and Legion of the Damned, as elite super-powered Space Marines without an acknowledged Legion tie, can be represented by the Blackshields list (''Horus Heresy Book Six: Retribution''), possibly led by one of the [[Knights-Errant]].

==== Imperial Knights ====
Imperial Knights can be represented by the Questoris Knights list (''Horus Heresy Book Four: Conquest'').

==== Cult Mechanicus ====
Cult Mechanicus can be represented by the Mechanicum list(s) (''Horus Heresy Mechanicum Taghmata Army List “red book”'').

==== Militarum Tempestus ====
Militarum Tempestus can use the Solar Auxilia list (''Horus Heresy Book Four Conquest'').

Don't do that - Do Militia with Survivors of a Dark Age, it's cheaper, and closer to what you want.

==== Inquisition ====
Inquisitor warbands can be represented with the Shattered Legions list (''Horus Heresy Book Six Retribution''), or the Solar Auxilia (''Horus Heresy Book Four Conquest'') or Imperialis Militia & Cults list (''Horus Heresy Book Five Tempest'') depending on exactly what you want it to look like.