Here are the house rules we have going so far.
Traits"I am a Dog", page 25
Obviously, instead of either having "I am a Dog" as a Trait or a Relationship with the Dogs, the player character substitutes an appropriate organization ("I am an Inquisitor").
BelongingsThe word big is replaced with oversized, and the word "excellent" is replaced with "covered in spikes." This is intended to produce a desired aesthetic. (Also: crap items do not count as crap if being
used by an orc.)
The d4 bonus for "guns" instead goes to all weapons capable of fucking up someone in power armor. So not knives or hunting rifles, but yes to chainswords and bolters.
Instead of having a 2d6 coat, the player characters have some 2d6 item that serves as a symbol of their authority and position. (This could be an Inquisitor's robe, a very large hat, etc.)
CeremonyWe're still determining appropriate ceremonies to replace those in the book. To an extent we'll play it by ear: if someone comes up with a 40k-ish sounding ceremony, we'll just say "that's a ceremony." We're not trying to necessarily make a one-to-one correspondence with the ceremonies in the book; we're just trying to get a few predetermined ceremonies for flavor.
So far we have calling on the name of the Emperor, reciting
sacred texts, and making the sign of the
Astronomican.
ConflictsInstead of the most serious level of fallout being for Guns, all weapons capable of fucking up someone in power armor (i.e. all weapons that get an extra d4) count as guns.
Demonic InfluenceThis is the section that isn't entirely firmed up yet. I'm thinking the progression would be,
Doubt: Chaos Influence zero d10
Failure: Chaos Influence 1d10
Chaos Attacks: Chaos Influence 2d10
Heresy: Chaos Influence 3d10
Witchcraft: Chaos Influence 4d10
Planetary-Scale Chaos Incursion: Chaos Influence 5d10