As the origin of the term Grimdark, it's no surprise that Warhammer 40000 is a setting positively drowning in Nightmare Fuel. And we wouldn't have it any other way. * If you want to save some time, just accept that the whole game, mythology and all, plus expansions and any backstory or novella you care to name, was most likely built using this trope as the blueprint. EVERYTHING is Nightmare Fuel here. * Case in point, we have named almost every fighting force down here (Notably the Dark Eldar, Space Marine, the Imperial Guard, the PDF, which is the Imperial Guard's equivalent of a Redshirt Army, and even the Tau, the least grimdark faction.) some of the most significant aspects of the setting, (Hive Worlds and The Warp. Hell, even one of the food production planets gets this treatmen