It's a pretty hardcore but fun pack of custom maps that came out in 2014. The first map just drops you in front of some building, going to the back of it you find elevator that takes you to the roof, after wiping out the enemies your descent starts. Just as the name suggests, you going to go down, each level is a floor, to get to the next one you'll need to find a key for it first which will involve all sorts of funny things to happen, like one level will make you mess around with time machine, the other will have you fighting trough mouth and entestines of some giant eldritch mass of flesh and metal, etc.
There's also some story going on between the levels, where doomguy ocasionally gets calls from his mom where he speaks like a manchild, it's mildly funny.
The music kind of sucks though, i reccomend just turning it off in game's settings and put on something else in the background, like tractor noises compilation.
There's really a lot going on in this WAD, the words are not enough to describe all of it, unless i review every single level at which point no one would want to read that.
It goes incredibly hard with Brutal Doom, Trailblazer and Guncaster total conversions.
