Playing D&D in the Warhammer 40,000 universe?

There's a lot going on in this Narb Makes video. First off, it's a reminiscence about the D&D game that Narb played ten years ago that introduced him to Warhammer 40,000. His DM placed their campaign inside of a 40K underhive (the bowels of a gigantic, towering hive city). — Read the rest