Capital Prime, the UAC's headquarters and the last strongest fortress to held off against demon invasions, this place held many battles and they manage to defeat the forces of Hell time after time. The UAC built this place in the middle of the cliffs in the surrounding areas, covering the back and both sides except for the front as that is where the entrance into this place lies. The fortress holds two fortified walls, the first one is the height of a Baalgar Demon while the second one behind it was twice as taller, and the upper wall lies heavy plasma turrets while the second one fit with regular military weapon armaments. This fortress is capable of holding thousands of people inside and holds a wide underground interior that stretches within the mountain, making sure that they have everything they need to hold against the demons.

Further inside the mountain, inside the interior of Capital Prime lies the main source where Operation: Exodus begins. A large rocket, fit with strong engines that can reach in space and enough space to have thousands of people inside, capable of bringing everyone who is coming here to get off Earth and make their way to either on Mars or on the Moon. This large rocket will fire through a hole in the ceiling, making sure that they fire directly out of the fortress without doing any damage to the inside and outside. This here will be the last rocket that will be created on Earth, seeing that they have wasted enough resources to get this done and will be the last time this rocket will be created by the UAC.

Inside the interior where the rocket lies, having it sticking up in a huge place where a handful of scientists and checking the area, making sure it is ready. Inside the computer room will be the commanding general of the UAC who is Forge, standing there in the middle and looking at the wide window screen, looking straight at the rocket while men are behind him, checking their computers. General Forge reveals to be wearing a Praetor Suit but in a pitch black colour, all similar to the Doom Slayer's and Marcus' except the only thing different from him is that his helmet is different. His helmet that is in his hand shows to have a different visor shape, instead of the regular version like the other two, it is in a V-shaped visor.

Inside the room, two UAC marine came inside the room and walks up to him, taking off their helmets and stood tall for a salute to him and keeps their stance until he turns back to face them, which he does and salutes back at them, allowing them to lower their arms and give their report.

"General. Military assets are all in their stations and all counted for, all except for the marines from Firebase Bravo who will be supporting us in the sky with their cruiser."

"We also have conformation that the convoy will arrive in thirty minutes." The other marine spoke "Firebase Bravo wishes to accompany the convoy to make sure that it makes it here."

"Our men are to stay in their stations until the convoy arrives here, we will be dealing with any unwelcome hitchhikers along the road and we can't afford any problems. Tell Bravo to stay over the convoy and once they make it here, they will get new orders."

"Yes sir, anything else?"

"No." He turns back to the window "Back to your duties."

Both of them salute before they depart from the room, turning back, putting on their helmets, and heading off to report to the other high officials. Forge soon turns back and make his move outside as well, going to check to see for himself to see if there is any problems with the positions of where his men are, not want any drawbacks if the demons should come to attack again.

Elsewhere, back with the Doom Slayer and everyone else. The battle was finally over after the death of the female demon, since she was leading them and controlling them, because of her dying at the hands of the Doom Slayer, the surviving demons have fled the area. The Crusaders went across the area to make sure that they are all dead while Randall decides to send a search party into the catacombs of the demon hive, wishing to bring back the body of Marcus as proof of his death.

Doom and a handful of Crusaders stands watch over the cliff, getting a good look at the large warehouse, getting a good look at it because Randall and his team is about to blow it up. After they got the body of Marcus, they set charges across the area, preparing to remove this place and the pods as well. Randall and his team will go unlock the pods to see how much damage made to the people inside; those who look worse cannot be save as there is no cure to cure this mess, causing Randall and the Crusaders to end their lives with a bullet through their heads. Only several normal humans saved by the Crusaders as there is no sign of any proof of any demon energy inside of them, making them clean to depart with the others. Randall takes the wheel of his truck, drive out of there, driving straight towards the others, and wait for a good time to hit the detonator.

Elsewhere, Corporal Rhodes walks up to Doom from behind, behind him was his surviving marines who followed him up here to get the look at the place. "Hey Doom." Rhodes calls to him; getting him to look back "I'm taking my guys and returning back to the frontlines, back to the UAC. We have wasted enough time here, I know this feels bad right now but we have to return. You can still come with us if you wish to help us out again, I know you still got things to do with the Crusaders but the UAC needs you too."

"Everyone needs the Doom Slayer right now." Samantha appears suddenly behind them all, getting them all to turn their attention towards her, protected by two Crusaders "The UAC and the Crusaders need him as a weapon, a hope for both sides in order to win and survive against the demons."

"That is one way to put it." Rhodes said

"But you already have three men in the Praetor Suits." Samantha turns her eyes towards Rhodes "You should rely on them and not on the Doom Slayer." She looks back to Doom and walks up to him "There is something that you can do, something that would benefit us all in the war."

Before she could continue any more, everyone looks back out at the warehouse when hearing the explosion from underneath it. Randall hit the detonator once he and his team are out of its range, getting a good look at the view, seeing the ground underneath the buildings begin to sink as Randall picked perfect areas to blow up the hive. The whole ground sunk like quicksand, sending the buildings to collapse within seconds, covering the whole area in rubble and smoke.

"That takes care of that problem." Rhodes said when watching the view

"Yes but I doubt that was the last one." Samantha said

"Do you really have to be negative?"

"There could be more out there, still creating soldiers and using them to fight against us. If we ever find more of these places, they need to be destroyed no matter what."

"I will report this to the UAC about this… Unless they know all about this."

Samantha looks back to Rhodes "You should depart now, marine. You got a long journey ahead of you, just be sure that you remember what happen here."

"Don't worry, we know exactly what happened here today and we won't forget it."

"Good."

"Well Doom." He looks back to him "I guess we depart for now, unless you wish to come with us to Capital Prime."

"I think Doom should be alright at where he is." Samantha said "Besides, you already have three men in the Praetor Suits, bringing Doom to Capital Prime will be a serious problem."

"I guess so… But still."

"You will be fine." She looks behind them and notice one of the Crusaders coming towards them

"We have his body." The Crusader said to them, getting them all to turn towards him "We have him in the truck, if you wish to see him."

"I guess it's time then." Samantha walks past Rhodes and his marines "Good luck on your travels." She said when going past them

Rhodes looks back at her then to Doom when he comes over, seeing him nodding to him before walking after Samantha. Rhodes looks back to his marines and orders them to depart from the site, putting his helmet back on as he walks away from the area with his men behind. They return to their APC wherever they parked it, getting back on board and preparing to leave this area and prepare for a long journey to Capital Prime.

Samantha and Doom makes their way to the other Crusaders who stood around the back of the truck, looking at the body of Marcus who lies there at the back, covered in blood. The two looks at him as he lays there, remaining silent for a moment until they look to the side to Randall as he stood next to Doom.

"I wish he didn't die like this…" Randall said then turns his head to Samantha "We should get a move on, find a place where we could bury his body."

"Yes." Samantha turns away and walks off, joining two Crusaders on a move to a different vehicle while Randall and another Crusader begins to zip up Marcus in a body bag and leave him at the back of the truck.

Randall looks back to Doom after he zips up Marcus' body "Well man… Thanks again for your help against the demons, I do hope you can stay with us a little more but I guess you have somewhere else to go." He looks back to Samantha then back to Doom "I take it Samantha hasn't told you about it yet? I guess we should go see her right now then."

Doom nods and turns towards Samantha and goes after her and so did Randall while a Crusader gets on board the truck and drives it out of here. Samantha comes to a group of Crusaders and wait for Doom and Randall to arrive, once they arrive, she could begin the next plan on what to do from here and what she was about to say to Doom but was delayed by the explosion.

Samantha takes out an IPad and shows Doom a blue screen of a design of a large building "This is the Sanctuary." She said to him "This is one of the last scientific structures left in this world, said to hold resources that could help us defeat the demons and end the war. This is something you should try and see."

"What exactly is in it?" Randall asks

Samantha turns the IPad to face her "That I have no idea; I was never part of the research in that place. This place once belong to the UAC but they abandon the place, right now I believe it is overrun by the demons but somehow, the building is still intact."

"How can you be sure?" One of the Crusaders asks

"Because a drone went over its head a few weeks ago and I manage to get everything from that drone, so right now we need someone to eliminate the demon resistance."

"It's possible that there could be another female demon." Randall said then looks to Doom "I mean there must be some reason why the building is intact."

"That is why I need you and some Crusaders to join him." Samantha said

"What?" Randall looks back to her

"You need to go to the Sanctuary with some Crusaders, true he could do all of this all by himself but someone needs to look after him." She looks back to Doom "No offence."

"But what about you guys?"

"Like we said before, we are preparing to move to the north, once you're done there, try and join us in the north. We are going to join our Crusaders and maybe go to Capital Prime."

"Go to the UAC? Are you serious?"

"Yes. That depends on how the others would think of the situation."

"What of Marcus' body?" Randall asks

"We find an area where we could put him to rest; somewhere he might want his body to rest."

"So Doom…" She looks back to him "I guess for now we must depart. I hope you reach your goal and hope that we all survive the end of this war."

Doom nods to her and prepares to move out, taking some weapons with him and joining Randall and a group of Crusaders on a walk towards the Sanctuary while the rest of the Crusaders go on vehicle to the north. Samantha says her goodbyes with Randall and the Crusaders with Doom, wishing them a good luck on the journey to the north as they are going to need it. Samantha be the last person to get on a vehicle and joins the others, driving away from the sight and heading down the rough road. Randall and the Crusaders watch as their comrades leave them behind, force to go on by foot with the Doom Slayer to the Sanctuary.

The team begins their move, travelling together through the landscape, having Doom leading them on the trip towards the Sanctuary. Randall was in the middle with the team looking at the IPad and seeing how far it will take before they reach the Sanctuary. During the long trip, they do encounter demons and possessed zombies but Doom eliminated them quickly, not posing a real threat to them but it would get harder for them when it eventually reaches nightfall. The team was force to take a break, finding a place where they could hide and hope the demons do not find them while they rest.

The team came across an abandon building that appears to be a gas station, having the team to move straight inside where they check and secure the area. Once it was secure, they go inside and try to get some rest, having two men to stay awake and watch over the area while the others fell asleep. Randall would be one of the Crusaders to stay awake; he stays by the window for the moment then turns back and approaches Doom. He sits there against the wall with his arms crossed and his double barrel next to him, about to sleep but he raise his head towards Randall before he does.

"We'll move out in a few hours, you should get some rest, we got to need you at your full max when we go back out there."

Doom lowers his head back down, looking down at his legs and falls asleep while leaving his suit and helmet still on. After he fell asleep, this here is when his dark dreams come into play when he begins to remember all the events in Hell and on Mars when he sees flashbacks of his past, slight visions of his battles against the demons but when his visions finally become clear as he tells one of his stories in Hell.

Long ago during a time unknown but it was a time when Doom became a Night Sentinel, joining alongside his Night Sentinels through the dark pits of Hell where they go for a hunt against a rare demon. Four Night Sentinels and the Doom Slayer himself, traveling through the plains of Hell until they eventually come across a fortress in the distance. This huge fortress shows its colours, having the walls made of stone and still drips with blood, showing many symbols over the walls and a few dead bodies hanging against it, having three large spires with a gust of flames on each one.

The four Night Sentinels stood alongside the Doom Slayer on the cliffs, looking out at the fortress and loading their weapons ready. One of the Night Sentinels turn his head to Doom and speaks out. "This fortress is called the Tower of Babel. It is one of the few structures that holds a rare demon."

"Not as powerful as the one in the Tomb of the Malevolence." Said the other Night Sentinel

"That tomb must never be opened." Said the other sentinel when turning his head to the one who mentioned it "Let's focus on this demon first before it leaves."

"I'm ready when you are, sir."

Doom stood there looking out at the fortress, standing in the middle of the Night Sentinels. He gets ready for a raid as he takes out a type of weapon and loads it, placing this big cylinder shape shell inside the weapon, having a one round shot. The Night Sentinels load up their weapons, two of them carries type of rifles with blue outlines inside and out while the other two carries heavy weaponry, one looks like a Chaingun while the other one was an assault rifle. Once they are ready, Doom is the first to move down the hill and go straight towards the front door with the sentinels watching his back.

The team blasts through the front door, destroying two demons that was behind it. They storm through the broken gate, looking at two corridors that leads unknown, the team watches both sides and open fire when seeing the demons. Doom was standing on the left side of the corridor, aiming this weapon at two of the Hell Knights that come charging towards him, he charges the weapon before firing, firing a large blue energy blast, piercing through the Hell Knight's chest while the other one through the arm. The Night Sentinels on the right notice a handful of Imps and Pinky demons approaching them, they open fire, sending blue energy rounds, piercing their bodies quickly and killing them.

"Which way?" Said one of the sentinels while firing his assault rifle at the Imps

"We go left." Said another sentinel, he looks to Doom, seeing him nod then turns around and faces the left corridor.

Doom takes the lead while reloading his weapon, moving down the corridors with the Night Sentinels watching his back. They move through, killing demons in their way, wiping them out very quickly. A Baron came through, throwing a fireball at them, hitting one of them but was safe as he possess a yellowish shield around his body, appearing when he got hit by the green fireball. Doom and three of the sentinels fired everything they got at the Baron until it fell back, losing its arm and head. The other sentinels looks back, firing their weapons at more Imps that came running around the corners, throwing fireballs at them before getting killed quickly.

The team continues advancing through, killing more demons but they do not last long against them. They move up the stairs and through more corridors and large rooms, fit with more demons but they push forward, killing the lesser demons very quickly while taking their time killing the bigger ones. The team was stuck in the room for a while due to a Summoner hiding somewhere in the room, staying at the high point of the room, creating more demons before vanishing and was difficult to shoot it. Two of the sentinels fire their rifles at it when it stopped moving, shooting it many times and injuring it, getting Doom to run towards it to finish it off. He grabs the head of the Summoner and twists it to face its back, killing it. Once it was dead, the sentinels clear the room with what is left of the demons before advancing through to the next room.

The door to the inner chambers lies close to the team, protected by four Barons of Hell, two standing by the two while the other two walks around. Doom and the sentinels remain hidden behind the corner, looking out and noticing the Barons. Doom looks to the sentinels and they offer him a round grenade, once he pushes the button, he throws it, hitting the back of the Baron and stays stuck to the back until it explodes in blue and white coloured. The Baron lost a chunk of its back but it turns around, letting off a screech before losing its head when Doom came out of cover, firing his weapon and blasts its head off. The other Barons turn towards them and attacks, throwing their fireballs while running towards them, causing them to move back. They move away and into the large room, that way they could spread out and attack the Barons while they chase them, some of the sentinels did take a few scratches from the Baron's claws but they continue moving. Doom ditches his weapon due to running out of ammo, switching to these dual handguns that shoot automatic, firing blue energy rounds while moving backwards, shooting at this Baron many times until it was injured enough to smack its face in with its own horn. Two of the sentinels draws the other Baron in before the third sentinel came jumping off the edge from above, sending his sword through the back neck of the Baron, injuring it but the sentinels on the ground also drew swords and help kill it. Doom assist the other sentinel while he was struggling to kill his, running out of ammo, he goes to grab a grenade but the Baron hits him to the ground, about to finish him but Doom came towards the Baron from behind, sending his sword straight through the back, sending the end of the blade through the mouth. He kicks the Baron to the side, sending it to the floor then looks back to the sentinel on the ground and helps him up off the floor.

"You alright?" Said one of the sentinels who approaches the two

"I'm fine…" He responds to the sentinel then looks to Doom "Thank you." He turns back and picks up his grenade off the ground and taking the sword off the floor as the Baron was no more.

"Watch yourself next time." Said the other sentinel "The demon is right around the corner, through the door is where it is waiting."

"Then let's not keep the demon waiting them."

The team prepare themselves for what is to come, making their way towards the main door and open it up. The door takes them upstairs, taking them to the top of the tower where they see the outside as there was no roof on this place. The room was a large decagon shape room with a few pillars around the area, no sign of any demon but they move into the open, staying together and waiting for the demon to show up. They know it is here because they could hear it, hearing the loud footsteps coming closer to them, causing them to stand together in a circle, checking their surroundings and waiting for the demon to show itself. When Doom looks to the left, he could see it, standing behind this large square pillar, seeing this large demon coming around the pillar and revealing itself to the Night Sentinels.

The demon was huge, twice the size of a Baron, a tall and muscular looking demon with dark red skin and black coloured armour and has large wings. Its face was similar to a Baron, having the curved horns and its eyes glow in red. The demon is known as an "Overlord' it stood there looking down at them, they take aim while two of them drew swords. The Overlord was unarmed but it was taking something out that was behind it, showing the Night Sentinels a skull key, holding it with one hand but surprises them when it is actually an energy sword. This blade is the Crucible, the large orange energy blade with a rectangular shape with two sharp points at the end of it, having demon markings on both sides of the blade.

Doom attacks first, drawing two of his guns and started shooting like crazy at the Overlord, shooting it while moving backwards while the others scatter while firing their weapons. The two with the swords backs away, sheathing their swords and drawing out two handguns and help shooting at it. The demon moves towards them, swinging the Crucible down and slicing through the ground, he looks to the right at this sentinel who was running to the side near the pillar. The Overlord charges a large orange fireball on its left hand and threw it towards him, causing a massive explosion, destroying his shields but was still alive for the moment. The Overlord swung the Crucible at him after throwing the fireball, slicing him in half and cutting the square pillar next to him, cutting halfway through. The sentinels stopped and watch as one of their comrades is already dead, one of them decides to charge towards the demon, drawing his sword and sending his sword through the back of its foot. The demon felt the sword running through its skin; it turns around, hitting that sentinel and sends him flying back. The rest of the sentinels continues shooting while moving along the side, one of them throws a grenade and hits the demon in the chest, exploding and pushing the demon against the pillar.

"Swords are not going to work against this thing!" Said one of the sentinels who was carrying the assault rifle, looking at the sentinel who stabbed the demon.

"Something is happening…."

The Overlord moves forward and sustain little damage from that explosion; the demon retaliates by engulfing its arm on fire and slams the ground, creating a ring of fire that spreads over the floor and heading straight towards them. Everyone jumps when the flames got towards them, when they look back at the demon; it threw another large fireball at the one who stabbed him, hitting his chest and sending him collapsing to the floor. The sentinel was still alive but injured, he was getting help from another sentinel, helping him up off the ground while Doom helps them by drawing the demons attention towards him. Doom keeps firing his weapons, doing little damage to the demon but he continues shooting so many rounds through the demon. The other sentinel assist on covering the other two, firing his assault rifle until running out of ammo, dropping the gun and taking out a long barrelled rifle, placing it over his shoulder and was about to fire but the demon turn towards him, it moves towards him and swung the Crucible, slicing him below the waist. He fell to the ground before he could fire his weapon, the gun lays there intact and Doom got his eyes straight towards it but looks back at the demon, seeing it looking back at him as he is next to be targeted. The demon charges another fireball but threw it in the air, causing it to break into three projectiles and came crashing down up Doom, doing small explosions and damaging his armour. Doom kept shooting until he ran out of ammo, he switches to a rifle and kept shooting its head while it moves towards him. The demon swings the Crucible around, almost cutting Doom as he tries to avoid it, rolling to the side to avoid the swing then crouches there and keeps firing his rifle at the demon before moving away.

The two sentinels moves behind the demon while it continues attacking Doom, creating another ring of fire around the demon, causing everyone to jump. Afterwards, one sentinel watches the demon while the other one goes after the rifle on the floor, next to the dead sentinel. Once he got that rifle, he took aim and fires, shooting a bluish laser beam from the gun when it charges for a while then discharges, hitting the demon through the back. The beam went straight through and damaged the demon badly, giving Doom the time to switch to his ultimate weapon. He brings the BFG into the fight, charging the gun before discharging it towards the demon, sending the greenish energy ball straight towards the demon, hitting the demon in the chest and sending the demon falling back, consumed in green electric energy. The demon fell but was still alive, it tries to get back up by turning to the side but the others keep shooting at it. Doom moves along the side, firing the BFG again, hitting the demon on the arm and causing it to lose its arm from that blast, making the demon disable for the moment. Doom places the BFG away and moves to the decapitated arm, taking the Crucible off its hand and drawing the energy blade, using it to finish this by sending the sword straight through its face when it turns towards him, sending the sword halfway through his face then pulls it out. The demon was finally dead, falling back on the floor while Doom stands there in front of it, looking at it for a while until he turns his head to the side when his sentinels stand next to him. They look back at the demon and noticing it not disintegrating.

"The demon is dead right?" Said one of the sentinels

"That is one tough Overlord… First time fighting it…." Said the other one while looking at the demon, soon to turn his head towards Doom and the Crucible "That blade… It really suits you."

Doom looks back at the Crucible when raising the blade in front of him, looking at it while holding onto the handle with both hands. He manage to disable the energy blade, making it a simple skull key then places it away for now. He looks back at the sentinels then back to the demon, seeing as that the demon is now dead, they can finally depart.

His dream ends when the demon was no more, he was awakened by Corporal Rhodes when he called out his name twice, causing him to wake up from his dream. He flinched when he woke up, grabbing Rhode's arm with his left hand while raising the double barrel with the other hand, soon realising it is just Rhodes.

"We got to move." Said Rhodes "It's time to make it to the Sanctuary."

The rest of the Crusaders stand outside of the building, standing watch over the area but sees no sign of any demons around right now. Corporal Rhodes and Doom came outside, coming out last while everyone was already ready, allowing Doom to sleep a while longer. Once he stretches his arms and his neck, they begin to move out, moving along the road again and prepare their trip to the Sanctuary.