I think this is a reboot. Was there actually a plot in the original Doom? Whatever the case, this version of Doom is a vast improvement on the previous game in the series.
This is a return to the pure shooter style of early FPS games. There are a few cut scenes and all that, but who cares. The killer feature here is the ability to pull off gory finishing moves in order to gain health and ammo. And you are not just running backwards. The level design is impressive. They are bright a spacious with lots of verticality and room to move. And you will have to keep moving as the onslaught of demons is relentless.
OCD gamers can scour levels for secrets and challenges. I was just content blasting away.