A/N: The only song I'd suggest listening to for this chapter is the Unforgiven, by Metallica (the first one).

Charlie slowly opened her eyes, looking around to see they were outside the Hazbin Hotel.

"We're back." Charlie smiled, looking up at the Doom Slayer. However, the Doom Slayer merely set her back on the ground, and immediately pulled out the book from the quantum pouch.

"We need to get to Earth." Vega announced. As he was flipping through the pages of the book, Charlie looked back at the hotel, seeing Vaggie, Angel Dust, Lucifer, and Lilith running out the front doors.

"My God, you were gone for so long." Lucifer informed Charlie. "What happened?"

"We thought… we stopped the demon invasion." Charlie panted out, clearly exhausted from the fight with Alastor. "We went back to Hell, and they transformed Alastor into a monster."

"As if he wasn't already." Vaggie muttered. Charlie ignored her, and continued speaking.

"After we killed him, we thought it was all over, but that's when their endgame was revealed." Charlie said. "It's Earth. They were just distracting William so they could invade the Earth without him interfering."

"Eh, oh well." Angel Dust shrugged. "We'll just get more guests here."

"No we won't." Charlie said determinantly. "Because William and I are going to stop them."

"You, are going with him?" Lucifer's eyes widened. "He's a demon killer!"

"And not once did I ever feel my life was in danger from him." Charlie countered. "We already have an overpopulation problem here. If the demons from that other dimension succeed in destroying Earth, it will just make the overpopulation even worse."

"Charlie are you sure about this?" Vaggie asked nervously. Charlie half smiled, and stepped towards her friend.

"Vaggie, my whole life I wanted to help demons." Charlie told her best friend. "But I never actually made a difference. Now, I can."

Vaggie smiled and nodded, knowing her friend finally found her purpose in this twisted world.

"You know I want nothing more than to see you happy."

Charlie smiled.

"I'll help you any way I can."

Charlie turned to the Doom Slayer, who stopped turning the pages, apparently settling on one in particular.

"What do we need?"

The Slayer looked up from the book, if only for a second, and Vega was the one who spoke.

"The book indicates a ritual to get to Earth…"

An hour later, half a dozen candles were lit and placed in a half circle on the floor of the hotel's lobby, with Charlie reading the incantations and doing the hand gestures from the book. Minutes later, the flame on the candles erupted, and a portal opened on the along the wall that the candles leaned against. Charlie tried to peer inside, but the portal was surrounded with fire.

"Ready?" Vega asked.

"Not yet." Charlie told the Doom Slayer, turning around to her friends and family.

"Mom, Dad, I know we had our arguments, but I will still always love you guys." Charlie walked over to Lucifer and Lilith, and the Magne family wrapped their arms around each other in a group hug.

"And we'll always love you, Charlotte." Lucifer replied. Charlie nodded, and turned Angel Dust.

"Good luck out there." Angel Dust held out his hand, and Charlie shook it.

"Thank you." Charlie replied. "Good luck in here." Angel Dust chuckled, and Charlie turned to Vaggie.

"Vaggie, I'm sorry-"

"Hey, it's okay." Vaggie told her former girlfriend, pulling her into a hug. "This is what you're meant to do, not the hotel. I'm happy for you." Charlie smiled, before walking back to the Doom Slayer.

"Oh hey." Vaggie walked up to the Doom Slayer. "If she dies out there, I'll kill you."

The Doom Slayer smirked beneath his helmet, but nevertheless nodded.

"Ready to go?" Vega asked, as the Slayer held out his hand.

"Yes." Charlie whispered, taking his hand in her own. The two turned towards the portal and walked through, where they felt themselves engulfed in an orange light.

Charlie and the Doom Slayer stepped out the portal, finding themselves in a meadow. The princess of Hell looked at the sight in front of her, and her jaw dropped in awe. There were fields of grass, with flowers blooming, and rabbits hopping in and out. In the blue sky, there was a sun that shone down on them, and it felt good.

"It's beautiful." Charlie whispered, closing her eyes.

"No."

Charlie's eyes snapped open, realizing it was William who spoke. With a sense of dread and fear, Charlie turned around, and what she saw nearly broke her. The trees and grass were on fire. The animals were ripped apart, and their entrails were scattered across the ground. In the distance, there was a city that was suffering the effects of being ransacked, with buildings on fire and destroyed, and smoke was billowing out, turning the sky black.

They were too late. The demons won. Hell had invaded Earth.

Charlie fell to her knees and began sobbing, while the Doom Slayer shook with a fury that he had never felt before. As his rage boiled over, he raised his arms and smashed them into the ground, causing the Earth to shake from his anger.

"NOOOOO!"

A/N: And that's it! I might or might not write a sequel to this fic. If I do, it will take some elements from both Doom Eternal and Doom 2. The Icon of Sin will definitely appear, and depending on how he shows up in Eternal, I might have him play the same role he did at the end of Doom 2.

Also, I'm thinking on introducing a multiverse of Hells in the next story, so expect a lot of other crossovers with different properties.

All in all, this has been a blast. Thanks to everyone who stayed this long, and hopefully I decide to write more. Then again, I'm planning on incorporating the plot of Eternal into this, and a lot can happen in a month.

Regardless of what happens, it's been fun.