Death Watch is about Small Space Marine squads opperating as special opperations squards for the Inquisition (Ordo Xenos)
For the most part the Inquisition is all about keeping the Citezens of the Empire pure and fighitng off internal threats. Once there has been a full scale invasion then other imperial orginizations get involved, Imperial Guard, Impeial Navy and of course Space Marine Chapters.
I have read the intorduction adventures and hunting down Genestealer cults is right up the alley of the Deathwatch. Tyranids use psychic manipulation to gather support before they invade.
My question is how do the oher major Xenos races do things that would get a Kill Team called in.
I can for example see someone having illigal dealing with Eldar, Tau or maybe even Dark Eldar. But if they are just breaking Imperial Law then a more standard Inquisitorial Kill Team would probably be sufficient.
I can immagine a chaos cult springing up on a planet, but wouldn't that fall more under the responsibility of Ordo Hereticus, or even Ordo Maulas.
I guess I am wondering how you get an Ork cult, or a Necorn Cult.
I am new to this game and am planning on running a DeathWatch campain sometime in the next few months, but I want to bring in all sorts of vile Xenos, not just Tyranids.