Generating NPC stats?

By MattBridgerv777, in Deathwatch Rules Questions

Don't know if this has been asked before, but one glaring omission I've noticed appears to be the lack of ways to create custom NPCs.
Have I just blinked and missed it? How does one actually go about creating stats for xenos or other strange adversaries that don't appear in any of the supplements?

It's your work as GM to adjust NPC stats. You must know what challenge what enemy presents to your PCs team. The only way how you learn this that I know is to try, try again and again.

The designers do not follow any particular rules when making NPCs, they have an idea and go with it.