Welcome to the Hydrosphere, an UAC water facility placed in the middle of somewhere where demons decided to show up from hot Hell and get some fresh water to their demonic mouths, but this time they will receive some bullets. This WAD might take you over 30-40 minutes to complete with aiming at finding all secrets (and they are not that difficult to find, plus there are not so many of them, two is maximum per map). The difficulty curve is approachable for most of the players as with every new level there are more and more higher tier monsters added to the party, for example in first level you have Cacodemons and Hell Knights as the most threatening. While since second level the Pain Elementals with Barons of Hell, Mancubi and Revenants are going to show in various places around a map, plus most of the ambushes for now are performed by weaker monsters like Zombies or Imps. Starting from the third map you are going to meet Arch-Viles in every level with even more annoying ambushes placed to surprise you, if you are playing this with Project Brutality 3.0 it means even more Flesh Wizards, ouch.