"Down the dark decades of your pain, this will seem like a memory of Heaven." Pinhead, Hellraiser III: Hell On Earth

This is a bizarre horror fantasy setting. It combines elements from many genres (Science Fiction, Weird Fantasy, Steampunk, and Horror, etc.). Various RPGS and Campaign settings such as Darksun, Ravenloft, Spelljammer, Arduin & many more are inspirations for this abomination.

“I have harnessed the shadows that stride from world to world to sow death and madness.” H.P. Lovecraft, From Beyond

Note: The name Dawn of Ashes is an allegorical metaphor meaning "beginning of the end"