OT, but I've always dreamed of a Borderlands -style looter shooter (maybe with some added spice via a Bulletstorm-style skill-kill system) where you play an ork. It'd be the perfect mix. No other species is more suited to FPS-RPGs.
Kind of surprised no one has suggested The Expanse yet, so let me be the first! Gritty, noir-ish sci-fi series set in our Solar System. The impoverished Belters (those who have grown up on the colonies of the asteroid belt) and their rusting, claustrophobic space stations look exactly like what I imagine the Underhive to look like. I just watched the first season on Amazon Prime.
The Expanse is one of the best Sci-fi shows to hit since Firefly. It's also one of the only hard-science shows I've ever seen as no one is really willing to accurately portray space with realistic technology.
I recently saw Annihilation. It has some very Tzeentchian imagery, like uncontrollably mutated plants and animals, rendered in absolutely gorgeous detail, accompanief by a haunting, droning soundtrack. Truly an audiovisual experience.
I've just seen Android Cop (2014) and a lot of the scenery looks very Necro/bombed out city with touches of Mad Max and The Cars that Ate Paris. Could be inspirational for a corrupt Enforces campaign plot.
I dunno if it would be considered inspirational viewing but dark tourism on net flux is a rather interesting show cause it shows some rather seedy stuff you can do around the world. Not all of its super dark but some of its just nuts.
the movie itself is very clean, so more like Infinity. but there are scenes where you can see how the city is layered that make me think of a hive city (the early roadway chase for instance). it's also a good flick.