Doom is already a pretty metal series. Hell, flames, the damn music, demons getting turned inside out - that kinda thing. But developer id Software wanted to take the crudeness one step further, which is what inspired Doom: The Dark Ages' medieval pivot, according to its director.
Doom (2016), Doom Eternal, and Doom: The Dark Ages game director Hugo Martin spoke to Edge Magazine in its latest issue about why the team decided to make the newest game a prequel and why they landed on a medieval fantasy setting, of all things. (The answer won't surprise anyone who's seen the game's skull-crusher weapon that spits out bone shards.)
