Hello and welcome! To my first FanFiction. As the title states, it's Hazbin Hotel and Brutal DooM. I'm not gonna drag this out, so enjoy!

(Doom is owned by ID software; Brutal DooM to Seargent Mark IV and Hazbin Hotel by VivziePop)

The DoomGuy stood atop a pillar as it raised up in front of the visage of the biggest Demon the DoomGuy had ever seen. He held his Rocket Launcher, and grinned underneath his helmet before firing a few rockets at the Icon of Sin's pulsing brain, only one hit. A Mancubus, a huge, fat demon with flame cannons for hands pumped it's flames at him. A wave of heat washed over him, before he was knocked off. "Unf!" He grunted as he slammed into some lava below. He ran for the nearest radsuit, hastily pulling it over his bulky green armor. He looked back up, and hopped onto the pillar, this time, facing away from the Icon of Sin. He snarled, and fired some rockets at the Mancubi until it was just guts and mush. He turned around, and with a small grin, fired a rocket at the Icon, nailing it in it's brain. His vision went white as the creature exploded, it's thrashing arms destroying untold miles of Hell's surface. The Marine felt a brutal wave of heat surround him, as he felt himself get flung miles through Hell. He landed on something hard. That felt like.. A road. He sat up, and looked around, finding himself to still be in Hell, but it was a city. "What the fuck?" He looked around, then down at the smashed remains of his Rocket Launcher. A guttural growl escaped his throat, and he tossed away the Launcher. He stood up, his Super Shotgun materializing in his hands. He glanced around, his eyes landing on a bar. He strode over, and kicked in the door, stepping in. All eyes were put upon the DoomGuy. He looked around. They weren't Imps, Pinkies or Barons. They kind of looked a bit civilised. They wore clothes, and looked like fucked up regular people. He grabbed the nearest one, and tossed him onto the counter, making a few people run as some "tough" looking demons stood up, and approached him with a few switch blades. "Aight, look buddy, we can do Dis tha easy way or da hard way. Wuzzit gonna it be?" The DoomGuy grabbed his knife, and snapped the blade with ease. He took the broken blade part and jammed it into the side of his skull. Several Demons ran, screaming. He blew the other tough Demons away, before tearing each and every other Demon apart. He lumbered up to the counter, and slipped over it, seeing the female bartender on the floor, crying silently. She looked up at him, realizing her imminent doom had arrived. He grabbed her by the hips, and neck, and tore her in two, spilling her blood all over himself. He was just about to leave when he heard a certain spider demon and some other demon speaking. "Thanks for the BJ, Angel~" "No problem, Mikey." They both noticed the mess, and both of them recoiled in disgust and confusion. "What the fuck happened?!" Angel shouted, before Michael whispered to him, "I think he had something to do with it." He pointed to DoomGuy, as he ran out, screaming. Angel Dust looked at DoomGuy, who turned around, his Super Shotgun in hand.