TheSword
Legend
Schooled! Great post. I forgot that it was green ronin that did 2e. I got into it relatively late with the Hogshead reprints of enemy within.Your numbers are low.
Warhammer Fantasy - Old World Setting
WFRP 1e: Citadel, Flame, and Hogshead all produced material.
WFRP 2e: Green Ronin for Black Industries. Mechanics similar, but attribute list different, and skill system significantly different.
WFRP 3e: Fantasy Flight, using their Narrative Dice engine.
WFRP 4e: Cubicle 7. Looks like a revision of 2nd, but changing a lot of mechanics in some inobvious ways.
Note that 1, 2, and 4 have attributes in similar scale ranges, but have lots of other differences.
40K setting
Dark Heresy: Black Industries. Then migrated to Fantasy Flight Games (FFG).
Dark Heresy 2e, Rogue Trader, Deathwatch, Only War, Black Crusade: all use the same core mechanics as Dark Heresy, but make some changes. All by FFG.
Wrath & Glory: Ulissies Spiele, then Cubical 7.
Imperium Maledictum: Cubicle 7
Age of Sigmar setting
Soulbound: Cubicle 7
Only the FFG games were written for intercompatibility.
8 Companies: Black Industries, Citadel, Cubicle 7, Fantasy Flight, Flame Publications, Green Ronin, Hogshead, Ulissies Spiele
3 Settings
8 different sets of mechanics, 11 discrete RPGs (6 intercompatible), 14 total editions.
The OP seemingly lacks sufficient knowledge to make the needed distinctions for meaningful results.
It’s great IP. My aim with Imperial Maledictum will be to try and capture the dark heresy feel.