"Causatum; situation following an event, occurence"

They say you can find the weirdest shit in Tehran, according to the US Force Recon Marines. Lieutenant M. Hershowitz and his remaining crew of three just happen to find one such anomaly that could be classified as 'weird shit' after a catastrophic earthquake, and it happens to be none other than a rainbow-maned, clueless, hotheaded and speedy pegasus from a child's show. But there's more to her arrival than it seems, as enemies seek to exploit the newcomer to the war-torn world.

Welcome to the aftermath of Iran, Rainbow Dash. Check your gear, strap up and get ready for one hell of a ride with Delta Squad.

Spoilers for Bioshock Infinite, people. Seriously. Scroll down at your own risk.

After killing Booker, Elizabeth heads to Equestria to secure her existence as her past catches up to her. Equestria begins to suffer temporal and spacial disruptions.
May involve Eleanor Lamb and Bioshock 1/2 universe later on. I'm bad at descriptions, just give it a chance and read a bit. Rated Teen to play it safe. I'm still pretty new to writing, so don't expect too much of me.

Stop me if you’ve heard this before. A man wakes up with a blinding headache and no knowledge of where he is or how he got there. Furthermore, it turns out that the world that he’s found himself in is populated by Technicolor ponies. However, there’s a glitch in the matrix. This world is not the Equestria of old where peace and harmony reigned supreme. No, this is the Equestrian Wasteland. A place where ponies struggle for their survival against bands of murderous raiders, xenophobic Enclave pegasi, and mutated monsters of all shapes and sizes. Luckily, this man’s name is Ethan Smith, aka The Lone Wanderer, aka that Crazy Son of a Bitch. Join him on his crazy quest to find a way back to his home in the Capital Wasteland, and with any luck make Equestria a brighter place along the way.

A side story to Light Wanderings and Dark Wanderings but neither have to be read in order to enjoy this.

Applejack finds a strange visitor in her apple orchard one day, with even stranger stories to tell...
MLP/L4D2 crossover. My first story on FiMfiction.net! May add more tags as story progresses.
Credit for the image goes to brokencreation on DeviantArt.

After the Pandorica falls into the exploding TARDIS, it throws The Doctor through the very last crack in time, a crack through which he can cross universes.No TARDIS, no screwdriver, a whole new pony body and a certain unhappy plasmavore that fell through with him, The Doctor begins to think that perhaps his plan was not as fool proof as it could have been.

How will The Doctor protect the highly confusing, sentient ponies from the plasmavore that seems to be harbouring an unholy grudge against all things Timelord? How will he adjust to his new body? And most importantly, why does he have a sudden craving for...pears.

Well, at least he still has his bow tie.

He was always considered an outcast, a black sheep. When his peers find his secret, that he likes to watch My Little Pony, they taunt and ridicule him for it. But, after a freak accident, he is taken away to the land of Equestria. Has he truly found his place? Oh, and he's an ork. That might be an important little detail. Warhammer 40k crossover.

Engineer and Sniper, the RED team's campers, are pretty much the best friends one might see on a battlefield full of annoying teenagers with baseball bats and pyromaniacs who don't see things as they should. Engineer covers Sniper's back with Sentries, supplies the two of them with ammo, and in return, Sniper spychecks, defends Engineer, and gets rid of enemy Snipers.
However, after an incident involving a sapper, Razorback, and malfunctioning teleporter, the two are sent to a dimension where it's all the things Sniper and Engineer dislike. Nay, the things they hate. So how will the two get back to their camping, Nopeing, and Pissing? And why are the two replacements sent by the mysterious Grey Man so...mechanical?

Please. Somebody stop me from posting these stories. Rated Teen for mild language.

Thomas Miller proudly wore the armor of the feared Firemen of Columbia. Battle hardened and devoutly loyal; nothing could prevent one of Comstock's most elite soldiers from completing his mission. Even if that mission was to apprehend the Prophet's daughter, Elizabeth. He had a goal that no force on heaven or earth could stop him from achieving.....except perhaps Elizabeth herself.....

What happens when a pyromaniac finds himself dropped in the middle of Equestria?

Bioshock: Infinite/MLP crossover.

The Songbird, protector of the lamb of the flying city of Columbia was thought dead. Though as it would soon discover, his charge was not the only being able to open the mysterious tears. In the forest of this new land, he finds peace with the native animals. However, the urge to protect something, anything, would soon drive him to respond to the cheerful whistling of an equine with a penchant for protecting creatures like him, no matter how foreign they appeared.

No game spoilers, and the chapters that may contain vague spoilers are marked with a *
Contained within are the following characters from Bioshock Infinite: Songbird and the Luteces.

Vinyl Scratch has taken upon a new idea for a song after a fierce thunderstorm rolls over Ponyville. But even innocent intentions can go horribly wrong and as the result, Vinyl is teleported into the Capital Wasteland, a place wracked by death, desecration, slavery and most of all, the terror of insane pro-Americans accompanied by the usual, hideous radioactive mutations.

Can she survive the nightmares of this world, with the companionship of a man who seek to make a name for himself, just like the Lone Wanderer whom he is friends with? If they weren't so drunk, then maybe.