The Disease

by Within Dusk

Rating: mature
Tags: Horror, Profanity, Violence, Crossover, Death, Human, Left 4 Dead, Narcotics, Twilight Sparkle, Sad, Applejack, Drama, Gore, My Little Pony: Friendship is Magic, Rainbow Dash, Pinkie Pie
Length: 2680

A Left 4 Dead and My Little Pony CrossOver Story

Humans and Ponies have lived together for years but after a Disease Human and Pony Scientists Call the "Green Flu" Humans and Ponies alike began to get sick, they became violent, and then they start to Mutate into these freaks of nature, many ponies and humans fell victim to these beasts, its either you die or get infected.. I'm not looking to choose.. I would rather fight to my dying breath
[Cast]
Bill
Zoey
Francis
Louis
Twilight
Rainbow Dash
Apple Jack
Pinkie Pie

Published 2019-06-06 23:50:01 UTC
Last updated 2019-06-08 11:18:36 UTC

2 Weeks After the First Infection

"LET MOVE NOW!!" Francis Shouts as he and the 3 other Survivors, Bill, Louis and Zoey.

"RUN OR SHOOT BILL?!?!" Louis Shouts. "RUN OR SHOOT!??!"

"BOTH!!" Bill Shouts, as they Run and Shoot to a near by town.

"WATCH OUT!!" Zoey warns as a Hunter jumps onto Louis.

"AHHHG! GET THE THING OFF OF ME!! AHHHHH!!" Louis shouts.

"God damn it! I gotcha!" Francis shoots the Hunter in the back, killing it. "Merry Christmas.."

"RUN!!" Bill shouts running to a near by tree house.

"SHIT!! SHIT!!" Louis shouts shooting at the horde while moving back.

"DAMN IT!!" Francis exclaims running into the tree house.

The Survivors get inside the fortified tree house

"Shit.. uhg.. I feel like shit.." Louis says,

"Don't worry.. we'll patch you up" Bill says, looking at the Injuries. "they aren't too bad.. we just need to cover up the wound.."

"Alright.. uhg.." Louis says laying down to rest.

The Survivors then hear people talking in the basement

"Other Survivors.. Me and Bill will go.. Francis you patch up Louis ok?" Zoey says and she and Bill enter the basement. "Hello?.. we're here to help you, we aren't infected.."

A Yellow Pegasus with Pink hair comes out "Finally! someone's here to save us!" Other Ponies come out of their hiding spots. "I'm so happy you're here! do you know what this thing is?"

"We're just as confused as you are sweetie.. but before all this, they called it the green flu.. to me it's way more than a flu.." Bill says escorting the 6 Ponies out of the basement.

After everyone introduces themselves they hear window breaking.

"Ah shit.. Let's get out of here!" Bill says as he opens the doors and leads the survivors to a building but on the way there they hear a Charger yell and Fluttershy's screams of pain and terror

"FlutterShy!" Rainbow Dash begins to fly towards the Charger, knocking the Charger away for a moment

"Damn it! we gotta go!" Francis says as a horde of Infected start running towards them

"Shit!! It's a Tank!!" Louis shouts. "And it's heading for Rainbow Dash and FlutterShy!"

"We need to get them now!" Bill Exclaims running towards them and he grabs Rainbow Dash.

"No! we can't leave her!!" Rainbow Dash Shouts the Tank getting closer growling and roaring

"Bill we gotta go! SHIT!!" Louis shouts

"Go Rainbow! we both know I wouldn't last long in this terrifying new world! now go!! take care of each other!!" FlutterShy screams.

"NO!! I won't leave you!" Rainbow Dash says, tearing up

"Damn it Rainbow! let's go!!" Bill says as he runs with Rainbow Dash in his arms to a building

FlutterShy wanting to have one more moment of confidence stands proud as the Tank begins to pummel her into the ground

"FLUTTERSHHYYYYYY!!!" Rainbow Dash Screams and she begins to sob.

The survivors sit and rest, some even comforting Rainbow Dash.

"we need to find a way out of here.." Bill says as he looks out of a barricaded window.

"I.. I can't believe she's gone.." Rarity says, shaking.

"so what's the plan Bill?" Louis asks.

"If we can get to canterlot and find the Princesses we should be in the clear.." Bill says, lighting his cigarette. "let's just hope they aren't gone.." he opens the door and the survivors sneak around, finding the Mayors building

"Do you think the Mayor is still alive?" Louis asks in a whisper.

"Let's hope she is.." Bill says also whispering and they make their way to the Mayors office.

"Mayor?.. are you here?" Zoey says as she and other search her office.

"Guys.. I.. I found something.." Louis says standing infront of the Mayors body, Bloodied and torn to pieces.

"Shit.." Francis says as he looks at the wounds. "looks like she was caught by a hunter.. or at least some form of it.."

"Are you saying the infection can mutate for ponies too?.." Louis says looking at the wounds as well.

"if so we're gonna have to be way more careful.." Bill says as he looks for any clues that could at least explain where this infection came from

"I.. I think I'm gonna be sick.. I need a minute.." Rarity says as she walks away to throw up

"I would blame you.." Zoey says as she begin to look for where the Hunter could have come from, she then sees that the window is shattered. "fuck.."

"I didn't find much but I did find this letter in a document that was in that cabinet.." Bill says opening the document find picture of X-Rays and pictures of the mutated infected, including The Spitter, The Hunter, The Boomer, and The Smoker, even pictures of a Pony Version of a Witch. "At least we know the infection can mutate in ponies as well.. let's get out of here.. before a horde comes..."

"Yeah.. let's go.." Zoey says as she and the survivors walk out of the Mayor's building and towards Rarity's house

"You hear that?.." Louis says as the group hears coughing "sounds like a Smoker.. keep moving.."

Rarity screams "AAAAHHHHHHHHH!!!"

"FUCK!!" Bill Shouts and he sees the Smoker pulling Rarity up to him and a horde runs towards them "God damn it!" He begins to shoot at the horde and so do the others. the ponies swinging melee weapons at the ones behind

"Rarity!" Rainbow Dash flies towards her but a Charger slams into her, crushing her against a wall and the Charger slams Rainbow Dash into the ground

"Dash!" Francis shouts as he shoots the Charger, killing it "Come on! let's go!" Francis says as he helps Rainbow Dash up.

"AHHHHHHHHHHHHH!!" Rarity screaming more as the horde keep beating her while the Smoker claws and scratches

"Fuck!" Bill shouts as he shoots the Horde but its too late, Rarity isn't moving anymore

"It's too late.." Louis says putting his hand on Bills shoulder, seeing the Horde they run into a fortified building.

"Damn it.." Bill says as he sits on a near by chair, holding his head in his hand.

"we have to keep pushing on.. we can't give up now Bill.." Francis says. "Heh, look at me, I'm talking like Louis.. But I'm serious Bill.. we gotta keep going.."

"you're right.. we gotta keep going" Bill says and they go up to the roof

"Hey Louis.." Francis says, turning to Louis

"Yes Francis?" Louis says.

"Kill all Bastards.." Francis Says and he cocks his Chrome Shotgun "That's our first mission.." he Smirks and the Survivors jump down and begin fighting once more
.

-To Be Continued-

Author's Note

I made this to kinda Explain how Bill, Louis, Francis and Zoey met the Main 6 and for those wondering this takes place in a time before discord is reformed so we won't be seeing discord in this

No Mercy (Chapter 1: PonyVille)

"IF ANYONE CAN HEAR THIS, PLEASE REPORT TO PONYVILLE MERCY HOSPITAL! I REPEAT, REPORT TO PONYVILLE MERCY HOSPITAL" A Chopper Pilot says as he flies off to Mercy Hospital

"well, you heard him.." Bill says, lighting a cigarette "We gotta get there before he leaves.." says Bill as he gives everyone a weapon.

"I hate walking..." Francis says as he grabs a Pistol.

"well we don't have a car so deal with it Francis, come on let's go" Bill says annoyed.

-1 Hour Later-

"Come on people, we're getting close.." Bill Says.

"Oh yeah, Totally" Francis says.

"Hey do you hear that?.." Rainbow Dash says, The rest of the Survivors begin to hear Growling.

"sounds like a Hunter.. careful" Bill Says as they all begin to walk slower.

A Scream echoes in the air and a Hunter jumps towards them and it pins Francis and begins to tear him apart, Francis yelling, "GET THIS FUCKER OFF OF ME!! AHHHH!".

"Don't worry I got ya!" Bill says and he shoots the hunter off of Francis and helps him up. "You ok Francis?" Bill asks.

"Yeah, Yeah I'm good.." Francis says as he begins to walk, The others follow, they continue to walk until they hear the screams and growls of the horde.

"Ah shit.. get ready everyone!!" Bill shouts as he and the others survivors begin to shoot at the horde, Louis Exclaiming, "We have to get to Mercy Hospital, NOW!!" the Survivors begin to run, shooting their way to a near by Ladder

Bill Climbs up, shouting out to the other survivors, "Get up here!"

"Alright lets go!" Louis says and he and the others climb up to the top of a building, Louis sitting down, says, "We made it... I can't believe we made it!"

Bill responding with, "Son we just crossed a quarter of the town..." he grabs a M-16 Assault Rifle and cocks it, "Let's not throw a party until we're in the clear.." he says as he opens a door and goes outside, the others follow with weapons in their own.

"You do know the reason you 4 only have Melee weapons right Twilight?" Bill asks as they make their way to the Hospital.

"I understand, besides I wouldn't really trust myself with those things" Twilight says as she walks besides Bill.

"Good..." Bill replies before seeing the hospital Entrance. "Alright everyone we're almost there!" Kenny Shouts as they run into the Safe Room, using the time they have to rest.

"God.. This feel like an never ending hellish nightmare... got any plans? Anyone?" Zoey asks.

Francis Speaks up with a Smirk on his face, "Yeah I got an idea, when we get to the Chopper, we tell the guy to take us to Canterlot, Find the Princesses and they work with us to either cure or kill the remaining Zombies! haha! yeah!"

"Damn it Francis, this is a disease, that not even the Military could get rid of, they keep coming and never stop! not to mention if the Princesses happen to be dead... well.. I think we'll have no choice but to find a completely new piece of land.. like an island.. yeah that could work.. if things get worse than they are now, we'll get ourselves a boat and get out of here.." Bill Says.

Zoey looking mad "So that's it!? good luck every other possible survivor?! good luck with all the Zombies?! ya know that sounds like a cowards move to me!"

Bill upset says "Damn it Zoey, we trusted The CDC, The Military, and the Princesses, they all of done nothing! .. look.. its only the 8 us left for all we know.. we had more but we all know what happened to them! they wanted to wait longer and now they're dead!"

"FlutterShy.." Rainbow Dash begins to tear up, Remembering the gruesome death of her MareFriend.

Bill now feeling bad about the situation kneels down and comforts her "I'm sorry.. I wish I could've done more, but we were too late.. but.. think of it like this.. she had given us some time to get out of there.. she even said to take care of each other, she did that for us.. same with the others.. don't let her sacrifice be for nothing.. ok?"

Rainbow Dash wipes her tears, replying with a saddened, "Thank you.."

"You're welcome.. now.. lets go.." Bill says as he opens the door and the survivors begin their hopefully final fight.

-2 Hours of Fighting Later-

"Alright.. I've called the Chopper, Get ready!" Bill Shouts as a horde of Infected as well as a Tank runs towards them.

"Oh shit!!" Francis yells as he and the other survivors begin to shoot and hit the infected.

"Grenade!" Bill Shouts as he throws his Molotov lighting the Tank on fire and begins to fire along with the other Survivors.

"Get on! lets get outta here!" The Pilot says as he lands on the Helipad.

"Get in the Chopper! go go!!" Bill shouts as he and the Survivors get on to the chopper, and fly off.

-1 Hour Later-

"Ok.. We're almost out of the city.. let's just relax for now.." Bill says leaning back, Louis Looks to Kenny Saying "See Bill? we didn't have to find a boat after all! things are going great!"

"I guess so Louis" Bill says with a smile.

"So.. where are we going?" Rainbow Dash asks.

"Probably to some compound.. I would rather be somewhere else but this is fine..." Francis says with a small smirk.

"we can finally rest.. good.." Zoey says sighing with relief.

"Uh.. guys.. we're running out of gas and there's no where to land!!" The Pilot says as he begins to panic, handing parachutes to the survivors then.. Crash!

"Damn it.. ahg.. mother fu.."Bill Says walking out of his landing area limping, Bill tries to call out to the others "Francis! Louis! Zoey! Twilight! Pinkie! Rainbow! AppleJack!..." Bill begins to walk into the forest to find the others, hoping to god they aren't dead.

-To Be Continued-

Author's Note

(Order of Events for those not familiar with Left 4 Dead or Left 4 Dead 2)
No Mercy (Complete)
Crash Course
Death Toll
Dead Air
Blood Harvest
The Sacrifice

Crash Course (Chapter 2: Everfree Forest)

"Louis! Francis! Zoey! Anyone?!" Bill shouts out for the other Survivors, he looks around and he hears someone

"Help me! I'm down!!" Louis screams

"Louis!" Bill shouts out and he finds him, shooting the infected off of him and helping him up. "Let's get you up.."

"Thanks Bill.." Louis says, getting up. "Have you found the others?"

"No.. but we better find them before the worst happens" Bill says beginning to walk on the trail.

"Come on Bill I'm sure we'll find them in perfect shape" Louis says walking with Bill.

"let's hope so.." Bill says as they walk on the trail to find their friends

-2 Hours later-

"Alright everyone here?" Bill asks, turning to the other Survivors checking to see if everyone is there

"Yep everyone is here" Francis says cocking his shotgun. "Now let's go" he begins to walk forward

"Now hold on! we don't know where we are in this damn forest" Zoey says stopping Francis

"Oh come on! let's get out of here I hate Forests!" Francis says.

"Don't worry guys, I'm sure we can get out of here, we just gotta work together!" Louis says

"Everyone calm down!" Bill says looking into the forest. "I hear something..."

The group hears roaring and growling, the trees crashing down.

"What the?..." Francis says, turning to the sound.

"Get ready everyone!" Bill shouts cocking his M-16.

"What the hell is that thing?!?" Zoey shouts beginning to shoot at the hulking behemoth, known as the Tank

"Shoot this motherfucker!!" Francis Yells shooting the tank.

"GAAHG!" Bill shouts as he is hit by the Tank.

"Bill!" Francis yells, shooting the Tank more while Louis helps Bill up.

"Run!" Louis yells running away while shooting.

"Fire in the hole!!" Bill says, throwing a Molotov, lighting the Tank on fire.

"Kill it! kill it!!" Francis yells! shooting his final shell and the Tank falls, dying.

Bill panting "Those Tanks are almost unkillable.. damn it.."

"Come on Bill we can make it! there seems to be a car over there!" Louis says.

"Actually this car has some fuel.. not much but it should be able get us out of here" Francis says beginning to hotwire the car. "Come on.. Got it!" Francis manages to start the car

"Get in everyone" Louis says sitting in the front passenger seat.

"Alright, where we going?" Francis asks as everyone gets in.

"We need to get to Canterville, it's close to Canterlot and I remember there's a Church over there, they could have an Evac area over there.." Bill says as they begin to drive towards the big town, hoping to escape from this nightmare.

-To be Continued-

Author's Note

Sorry this chapter is so short, these chapters are mainly based on the Campaigns from Left 4 Dead and Crash Course only contains 2 parts both also short, please understand this ^^