Disclaimer: I don't own Harry Potter or Left 4 Dead (Even though it is a wicked game). I just wish I did.

Harry Potter/ Left4Dead crossover

In Case Of Zombies

By: Mage-Alia

Prelude: Convergence

Summary: What do you do when the world is being consumed by a mutated killer virus. What happens when your relatives, in one last reluctant act take you with them to another country, and what happens when they leave you for dead against the Undead hordes? Harry is put to the test as one of the few survivors of the Apocalypse, but with no help from the wizarding world, how long will he last?

AU, No Pairings.

Metro International Airport

0800 Hours

ETI: Minus 10 Hours

The Metro International Airport was bustling with activity.

People scurried from gate to gate as loud announcements where made over the speakers calling for missing passengers and lost luggage. The Dursley Family where crammed into uncomfortable plastic seats that bowed with the two male Dursleys weight as they waited for their Chuffer to finish loading their bags into the luxury car. Fairfield City had been chosen as their holiday destination in the Summer following Harry's Fifth year, Renown for it's National Parks, Medical Research Centres… and of course, the Steak. The sole reason the Dursleys had come was to find a restaurant that serve nothing but Steak, the size of Vernon's middle and Beer.

And Harry had the Dubious fortune of being dragged along with them.

Having been old enough to survive without a baby sitter, the Dursleys hadn't had an excuse to leave him on his own. They hadn't wanted to take him but they didn't want to leave him on Privet Drive either, so when Harry had Arrived home they'd told him to pack his clothes and get ready to leave the country. They'd always had a passport for him, something they never thought they'd even need, but it was with it that Harry found himself sitting in an economy class seat on a plane headed across the pond to the states.

Naturally, the Dursleys had flown first class.

Harry liked to think that it was because they where the only seats on the plane big enough for Dudley and Vernon's backsides to fit in.

In the airport Harry was told to maintain a distance from them of Ten feet at all times and so he was surprised when Petunia approached him, looking like she'd just stepped in something.

"Boy!" She shrilled, holding out a sheet of paper. "This is the address of the hotel we'll be staying at, we expect you to find your own way there but we will be going straight to the restaurant once we are settled in so we don't expect to be back until late so you'll just have to fend for yourself till then." She sniffed and reluctantly handed over a crumpled ten dollar note that Harry quickly squirreled away before she could snatch it back.

Petunia did a fair impersonation of Snape's sneer.

"If you're no there when we return from the restaurant you'll need to find some where else to sleep, we won't be waking up at all hours to let you in!" With that final declaration she turned around and simply abandoned him in the Airport without so much as a spared thought.

It took a while for the shock to wear off.

Fairfield University

1009 Hours

ETI: Minus 7 Hours 51 Minutes

She was running.

She could hear the howls of the horde behind her and it chilled her to the bone. Mike was breathing heavily and his eyes where wide as he dared look over his shoulder and gave a strangled yell of his own.

"Claire! Keep running!" He shouted in a voice pitched high with fear and Claire was instantly glad she'd ditched her high heels a mile back as he pumped his legs faster. Mike all but dragged her and for a moment it looked like they'd actually make it as a house came into view on the horizon, but their relief was short lived when out of the dark night there was a terrible screeching that drowned out all the howls from before. Claire didn't even get the chance to turn around or even cry out a warning as something barrelled into her from behind and all she could do was scream…

"ZOEY!"

Laying on the bed in her dorm Zoey nearly jumped out of her skin as her door was slammed open by her best friend.

"FUCK!" Zoey responded with equal volume, nearly crab walking up the wall in shock as she scuttled into a corner, a baseball bat coming into her hands as the lights blazed, dispelling the dark air of the horror movie playing out on the Television screen.

Gina blinked in surprise as she took in the sight of her best friend all but standing on the corner bedpost with bat in hand breathing like she'd run a mile. The redhead looked around for whatever would have caused the reaction and noticed the tinny screams of the actress for the first time.

"Fuck Gina! Are you trying to put me in an early grave?! You scared the crap outta me!" Zoey all but shouted, lowering the bat as she stood in the corner, trying to get her breath back. Gina frowned darkly,

"Well I knocked, but it looks like you where too wrapped up in the movie to notice. Honestly, I don't know why you watch all those things, you'll just give yourself nightmares with all the horror movies you watch." She picked up an empty dvd cover and scanned over it, recognising yet another Zombie title before she threw it into a pile. Zoey finally got her breathing under control and hopped down from the bed, placing the bat back against the nightstand as she walked past Gina and shut the door behind her, blocking out the shouts of the other girls in the dorms around hers.

"Well then, I'll have plenty to talk about with my therapist when I get older, but until then there's nothing wrong in watching the classics." Gina gave her a deadpan look.

"Zoe? Half of them are old, crappy, B-Grade movies from the stone age, and even if I thought they where any good I'd still tell you to stop watching them! I don't know if you've noticed but you've been in here, all semester! You've even started to miss classes! The Professors aren't gonna put up with it for much longer, especially with the final's coming up."

Zoey shuffled around the room with her head down as she listened to her friend's tirade, finally shutting off the television with a snap and turning her eyes to one wall where her posters where displayed. Nearly every horror movie since the beginning of movies had something up there, and her pride and joy was a replica shotgun mounted in a box right in the middle with the words 'In case of Zombies – Break Glass.' Neatly printed in plain view.

"They aren't." She responded to Gina's tirade, waving to her desk where a letter sat, one she'd been reading before she'd put on the movie to take her mind off it. The other girl picked it up and skimmed through.

"EXPULTION!?" She shrieked a moment later and Zoey couldn't look at her as she kept reading out loud.

"If the student fails to receive a satisfactory passing grade in the Exams at the end of the Semester we will have to choice but to ask you to leave the University… Zoey, finals are like a week away!"

There was a tense moment of silence and Gina finally sighed.

"Look, I came in to ask you if you wanted to come into the city with me today." Gina admitted, placing the letter back onto a stack of unfinished Essays. "With all the hype going on over the whole killer disease rumours I thought it'd be fun, besides, didn't you say you needed a new jacket? What do you say?" The other girl smiled openly and Zoey finally relaxed, throwing her a grin of her own, grabbing her old pink cardigan from the back of a chair and bending down to slip on her sneakers.

"Sure, I have to go in anyway, a new order came in at one of the stores and I have to go pick it up." Gina frowned at the brunette but didn't do more than crumple her nose in distaste for her friend's choice in movies as she watched her lock up,

"Ready?" Zoey grinned at her, "Lets go!"

Smokey's Heart Attack Barbecue and Grill

1143 Hours

ETI: Minus 6 Hours 17 Minutes

"This ain't how you treat a Veteran." Bill was grumbling as he tore off the apron and whipped his soap-wrinkled hands on it. Life as of the moment, quite plainly sucked the VC's balls. He hadn't taken two tours of Vietnam and a knee full of shrapnel just to be kicked around from one dead end job to another when he got back home. Sure everyone had loved him for a while and he'd gotten a few medals for it but these days, you couldn't even walk out in the street without having the kids of the day walk all over you for being Old.

Chucking the apron into the still full sink Bill growled under his breath and pushed away from the bench, limping only slightly from having to spend all day standing on his bad leg.

"I'm going out for a smoke." He grumbled at the nearest kitchen hand and made his way out through a side door, catching sight of a couple of fat tourists standing at the counter and salivating at the menu.

Bill didn't see anything special about it himself. It was just meat.

He'd been working there for a few days, saving up a few bucks so he could drift onto the next town. The grizzled veteran hadn't had anywhere to go after his 'honourable' discharge from the military. It had been his life, fighting for his country, but now he was no more than a bum living off payouts from the government.

Taking out a cigarette and perching on a nearby crate he sneered at it, wishing for a cigar, but he lit it up anyway. It wasn't like he could afford them these days anyway. Further down the alley a fight had broken out in the biker bar that was still roaring with heavy metal music like it had been since the early hours of the morning. He was half tempted to go over and join the scrap as one of the regulars was tossed out the door and into the alley but decided against it as the musclebound biker, covered in tattoos, gave out a roar and gleefully charged back into the fray.

"HEY BILL! GET BACK IN HERE! THERE'S DISHES THAT NEED DOING!" The manager, an overweight former truckie with a balding head and a plaid shirt yelled from the kitchens and bill gave and aggravated sigh.

"Yeah yeah, I'm commin." He grouched and put out the Cigarette on the crate before swinging off it, wincing as he landed on his bum leg.

"AND SOMEONE CALL AN AMBULENCE!" The manager shouted again from the depths of the bar. "SOME TOURIST HAD ONE OF THE STEAKS AND HAD A HEART ATTACK!" There was a laugh from the Kitchen hand.

"Was it the fat old guy?" He asked, rushing for the door as a waiter ducked in.

"Nah." The teenaged waiter put the remains of a steak down on a bench and joined him in watching the mother of the family screeching uselessly at another waiter. "It was the Kid."

Bill grumbled and shook his head.

They should start putting health warnings on those things.

Downtown Fairfield

1220 Hours

ETI: Minus 5 Hours 40 Minutes

Lewis was cursing himself as he marched along the street, briefcase under his arm, and his head hanging low. He'd chickened out again. All he'd had to say was two little words to his boss, and he would have been free, but he'd taken the cowards route and run for the hills.

To be honest, he needed his job. He lived alone, the rest of his family was on the west coast and he'd had trouble finding work he was qualified for. It was the reason he'd come to Fairfield in the first place. There'd been an opening as a Junior Systems Analyst that had been right up his alley. Junior meant there had to be a senior, and that meant there was room to move. But after a year, the promotion he'd been hanging out for had never come and all he wanted to do was leave.

Sitting down on a park bench he watched idly as an Ambulance sped past, it's rear axel almost scraping the road from the weight of it's cargo. It ran a read light at a nearby intersection and one driver had to brake in a hurry to avoid hitting it. They got out of their car and where yelling obscenities for a good minute before honking horns of the cars he was holding up forced him to move. The dark skinned man watched the lights changing until someone sat down on the bench beside him with a sigh.

It was a kid. He had a scruffy look to him, decked out in clothes to many sizes to big for him with a backpack slung across his shoulders. At first, Lewis thought he was a hiker, they got plenty of those types round here, what with the National Parks, but as he looked closer it became more apparent that this kid wasn't from around here. He looked more like a runaway.

Eventually the kid noticed his stare and sent him a slightly paranoid sort of look and Lewis shook himself out of his stupor.

"Uh, sorry." He muttered and the boy looked confused until he clarified. "...for Staring I mean. I've kinda just been out of it."

"Oh, okay." The boy turned around and closed his eyes behind his glasses before asking in a clear British accent. "Bad day?" Lewis couldn't help but let out a snort.

"Understatement." He answered and the kid grinned in something like understanding.

"That makes two of us." Lewis only just managed to refrain from asking, the kid probably wouldn't have told a complete stranger what was wrong anyway. So they sat there in a semi-companionable silence until Lewis's watched beeped, marking the end of his lunch hour.

"Damn… well, back into the jaws of hell." He joked and the kid laughed.

"Good luck then." He waved and for some reason Lewis felt far more light-hearted going back to work than when he'd left it.

Maybe he'd actually quit his job today… or tomorrow, tomorrow sounded good.

Fairfield Holiday Inn

1434 Hours

ETI: Minus 3 Hours 26 Minutes

"I'm sorry, but there's no one by the name of Dursley currently staying at the hotel."

Harry felt the bottom drop out of his stomach as the Concierge behind the desk of the Holiday Inn spoke those words.

"Are you sure? I mean they have to be registered here, they booked ahead and everything." Well, at least Harry hoped they did. This was the right address after all. Noting his panic the Concierge tried searching again.

"We did have two rooms booked under that name, one quad, and one double room. They where to have supposed to checked in a few hours ago, but since they failed to show up their booking was cancelled." He attempted to smile sympathetically, but Harry was too stunned to respond.

They – Never – Checked – In.

Harry's blood ran cold as the possibilities of their actions flooded his mind and he settled on one of the most likely scenarios.

They'd abandoned him.

It took a few long shuddering breaths before his emotions where under control and he looked up at the Concierge with obviously forced calm.

"Was there any contact Number attached to the Booking?" The man shook his head.

"No, I'm very sorry." His voice was laden with pity and Harry found himself clenching his fists so tightly his nails bit into his palm. "Would you like to make a call to anyone? We can organise to help you get home if you'd like." Harry thought hard, and for a moment, he thought to call Hermione, but with it came the realisation that he didn't have her number, and even then, there was no assurance she would be home as her parents often travelled.

"No." He muttered in defeat. "There's no one there." That said he turned and left the Hotel, ignoring the calls of the Concierge. Wandering out past an electronics store he stared into the window where the news was playing a story about some sort of domestic dispute in the suburbs that had gone horribly wrong when a wife had attacked her husband and felt his stomach growl. Rummaging through his pockets for the ten-dollar note he looked around for something to eat, thinking about making the money last before he settled on McDonalds.

The plastic seats, bad service and sloppy food where a universal constant throughout the world, and more than a little familiar as he ordered a meal and sat down in a quiet corner near two collage girls who where having an argument about horror movies and school work. He listened to them talking as he ate and sat there afterward, his head drifting closer to his tray as the day caught up with him. What had started with him feeling mildly optimistic, had turned into a nightmarish day from hell. They'd dragged him on a red eye flight to the states, abandoning him at the airport to find his own way from a neighbouring city. (He'd snuck aboard a train.) Wondered around lost until someone had given him directions only to find that they'd never turned up to their hotel. Either something had happened that had thrown off their plans spectacularly, or they had gone and done the unforgivable, abandoning him in another country without any help.

His wand, crammed into his bag, weighed on him heavily as he thought about doing magic. Maybe if the American Ministry detected underage magic they'd come find him, and send him back to England…

"Hey? Are you alright?"

His train of thought was broken by one of the collage girls who had come over to check on him. He got an eyeful of pink when he opened them and for a moment he cringed, forcibly reminded of Umbridge before he shook his head at the girl.

"No… I'm fine. I'll be fine." The girl looked somewhat doubtful, but nodded her acceptance anyway.

"Alright then… If you're sure." That said, she backed off and returned to her friend. Harry sighed and closed his eyes once more, listing to the girl's low voices as they talked between themselves.

Eventually they left to see a movie, and Harry decided to leave too. He'd need to find a place to stay the night. With no Dursleys and no money, he was screwed. Wandering over to a park, he did what he usually did in the summers at Privet Drive when the weather was warm enough and the Dursleys had locked him outside. He climbed a large tree and settled down in the branches, praying that no one would try to attack him in the night. So with the sun still above the distant horizon and the sounds of everyday life around him he fell asleep.

Fairfield City Park

1800 Hours

ETI: 0 Hours 0 Minutes.

He nearly fell out of the tree as he woke to the sounds of a car crash near by, and finally registered the honking of horns that blared alongside a message that was being broadcasted all through the city. Harry looked at his watch and noticed the time.

6pm

He'd been asleep for just under three hours… but what possibly could have happened in that time?

"All residents are advised to stay inside their homes. Lock and seal all windows and doors and await further instructions. Evacuation of the city is underway. People who can't reach their homes are advised to find the nearby evacuation shelters immediately while the crisis is dealt with…" The message continued to play, listing a number of shelters, and Harry only recognised the location of one, being so close by. Deciding to obey the orders, if only to find out what was going on, he made sure his bag was still on his back and climbed down from the tree, making his way to the shelter.

When he got there he found a few other people already inside, and a few he was even more surprised to recognise. The two collage girls sat to one side, and the black man from the park bench earlier was also there. He clearly recognised him too, and dared to wave him over. Harry approached and sat down on a box looking around at some of the other people. There where a few homeless guys piled into a corner, a pair of cops checking people with nervous looks as they entered. A group of teenagers had taken over one corner, and an old guy in an Army green jacket with a green barrette was smoking unheeded in the back of the room.

"I guess the day just went from bad to worse." The black man jested weakly. Harry met his eyes and he gestured to the room. "It isn't exactly inspiring, considering how many people there are round here." Harry looked around again and then back at the man, noticing for the first time how unkempt he really looked. He'd discarded the jacket of his suit and the sleeves where rolled up, while a red tie hung loosely from around his neck like a noose.

"What's going on?" The man looked at him strangely.

"Haven't you been watching the news? People have been getting sick all over, they're saying they've got some sort of highly contagious virus that's loose around here. Those disease control guys have been blaring on the news for the last hour about how it's been spreading. There's even been a few deaths due to it already."

Harry stared at him in disbelief, almost hoping that it was just a hoax, but there was a very real fear in the black man's eyes. He'd seen something happen already…

"Harry." He said out of the blue and the man jumped.

"What?" He asked, startled, and Harry held out a hand to shake.

"Harry, it's my name." His eyes widened in understanding and he took his hand firmly.

"I'm Lewis, nice to meet you."

A/N: Okay, so it's kinda vauge, and it's more of an idea that popped into my head when I was recording game footage. There are a few Left 4 Dead stories out there already, but I'm pretty sure there's no crossovers, but I could be wrong, you never know. So who picked up the references made in this chapter huh? I tried to create a timeline for the 10 hours leading up to the outbreak and where all our staring actors were in the hours before hand which is something most people don't go into that often.

And just so you know, the Infection was around before Harry arrived in Fairfield so that puts him and the others closer to the 2 Weeks after infection mark so timelines will eventually match up. He's just arrived at the very beginning of the mass contamination.

So, let me know what you think so far and I'll see about regular updates.

Don't forget to Review.

Cya