Not the Sid Meir's game but as in pirates that are not Orks (Freebooters) or Eldar (Corsairs) in 40k universe. Were there any in Battlefleet Gothic or in some obscure novel? Are there any in new RT rulebook?
I ask because I itched to GM anti-Imperial piracy game that is not 'We are all Chaos Cultists here' one-shot lunacy since I read that 'Orcs in Space' article in Dragon 149. If you remember one of plots was one where PCs have to defend bucolic pastoral world against Imperial expansion and I just thought what if PCs could work against Imperium for a change but not be bloodthirsty Khorne fanatics...