Absolutely agree, I love sourcebooks.I really prefer sourcebooks over scenarios, and would love to have books detailing different factions their facilities(locations) and equipment. I’ve been a bit disappointed with the Coriolis supplements so far, they’re almost entirely scenarios and the few that aren’t leave you with more questions than answers. Actually the Coriolis Atlas Compendium kinda pisses me off, it’s an “atlas” without a single map.
So what I want to see, details about the UPP(an entire sourcebook please) some of their colonies(maps please!) installations and the equipment they might deploy when fighting Xenomorphs. The same for Three World Empire and the ICSC worlds. Maybe it can all be one big “mothers guide to the middle heavens” with a section in the back for randomly rolling up colonies. etc.
Also, I'd love to see shout-outs to the old Leading Edge Aliens RPG, and other obscure pieces of lore. I love that kind of stuff.