| I should have been the one to fill your dark soul with liiiiiiiiiiight! |
|“||You have her face but you'll never have her fire!||”|
The Underworld is creepy, disgusting, and resembles the digestive tract of a certain space whale. Don't stand in one spot for two long, or you'll get attacked by the Underworld equivalent of intestinal parasites.
When you start, run towards the camera and jump up into the tunnel on the wall. Run to a red filmy membrane that blocks your path and swing at it with your weapon to rip it. Continue forward and you will enter a room with a Divinity Statue and a pair of Frosts. Kill the Frosts and tear through the membrane at the far end of the room with your weapon. When you step through, not only will you reach an cavern with glowing red symbols demanding an sacrifice to continue forwards, but you will also be treated to a cutscene where Trish asks for your help. Before Dante can get to her, he's walled in on all sides and confronted by a familiar puddle of sloppy demon poo.
Being comsumed once takes you to an alternate dimension where you must fight some Sargasso and a weaker version of Nelo Angelo, made easier for this fight. Once they are defeated you will return to face Nightmare
When you get Nightmare to critical health, you're interrupted by Trish. Curse her for this betrayal! From here on, she will also attempt to attack you. Keep moving and be on the lookout for a yellow line indicating where she's going to attack. Once Nightmare is dead... It's not dead. After you drain its health, it calls upon the last of it's reserves to gain emergency health, putting itself back at critical, and turns liquid but with its core exposed.
This final part is a pain. Nightmare's core will constantly bombard you with laser attacks while its little floating orbs pelt you with small arms fire and Trish tries to fry you into a declious smoked Demon Hunter for families to eat and enjoy. Pull out every trick in your arsenal to take it out, and don't be afraid to use your Untouchables, Devil Stars, and Vital Star. Air Raid and Vortex give you the most bang for your buck, but require Devil Trigger to use. Avoid using the Grenadegun, as you aren't able to dodge well when firing. The Shotgun has too short of a range to be effective, and the Nightmare Beta is useless. Sparda's Round Trip can deal some good damage and allow you to maneuver, but only use it after you've exhausted your DT gauge with Air Raid or Vortex, since the Sparda removes your DT gauge.
Once Nightmare is dead for real, watch the cutscene. The mission ends afterwards.