Much of ALIEN vs DEMONESS 2 takes place in a remote industrial colony unimaginatively named "Facility 13" and secretly being used as a Weyland Yutani Experimental Station... The colonists are unaware that deep within their midst the Company have several live Alien specimens (which inevitably escape, as they do) and, worse still, the Spleen Company scientists are messing around with a curious artefact found in the wreckage left after events of AvD 1. This artefact is Infernal and, a few unwise and ill-planned experiments later, the Company accidentally opens a gate to Hell...
Aliens and Demons on the loose, all of them more or less the exact shapes of Spleens as far as Luce is concerned, means all out war...
But where to set this war? Coming to the conclusion that I didn't want to use a single major building Placeable I'd used before, I decided to be impractical, as usual, and build the entire Facility 13 industrial colony from scratch.
Given that you can't see entire Areas at once in-game, here's a Toolset image that should give you the basic idea...
Instead of a stupidly vast and inflexible town, as my first loony impulse suggested it should be and which Gmax just laughed at, I became normal and created Facility 13 as a modular set of different buildings and structures which can thus be arranged together to create... well, to create big, ugly industrial complexes. Not much else you can make with piles of colossal refineries, reactors, silos, factories and so forth...
Shall post some proper screenshots soon when I've tidied up a few loose ends and hit a few more textures with bricks.
