A human child is found at the edge of the Everfree forest. She seems to embody all the innocence and magic that make up Equestria and the fantastical creatures that live there, but as the six friends struggle to care for her and find a way to get her home they discover that the human world can be a cruel and tragic place and through this loss of innocence they realize that they are what hopes and dreams mean to a child in another world who has no hope left.

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.

An object of unknown origins crash lands in the no-pony's land between Equestria and Gryphon territory. Princess Luna and Twilight Sparkle race to beat the Gryphons to the crash site, but discover more to the crash than they originally thought.

Cancelled, but preserved for posterity.

Archer is not having a good day. He's recently been knocked unconscious and imprisoned by a Fae race, notorious for their animosity towards humans and each other. Instead of cannibalistic Merfolk or mischievous Fairies, he finds... talking ponies. Who want him to be their "friend."

He is sentenced to remain in a small town they call "Eqshana", until he can learn to "live in harmony" with its inhabitants. Unfortunately, a message from his king, Jove V, has turned his prison sentence into a mission of espionage. Now he must escape these no-doubt insidious creatures, and even more importantly, stay sane doing it. Along the way, he will answer one of the most important questions he has ever faced: Is there really nothing to eat around here besides hay?

Part 1: Lyra's Pyro Predicament
Part 2: Twilight's Demoman Devastation
Part 3: King Sombra's Robotic Retaliation

When a mishap causes two para-dimensional weapons to colide with one another, RED Team's Pyro is sent flying from the Team Fortress 2 universe into the alternate universe of My Little Pony, where he is almost instantly discovered by Lyra, who shelters him in her home.

Having him hidden in her small townhouse isn't easy; keeping him from setting things on fire, teaching him that not every cart that passes by is cause for alarm, and that blue ponies are not something to be suspicious of.

However, with Nightmare Night soon approaching, Princess Luna feels that there may be something more sinister riding on the coat tails of Pyro's grand entrance; the first human to ever set foot in Equestria some thousand years ago...

There is a flood on the horizon. Equestria's enemies have united, and the coming tide will not only change the course of history on one world, but two, and bring about a monumental meeting that will bring brothers and sisters from those two worlds together.

At long last, the downtrodden will rise.

The battle begins.

Shocking archeaologic finds throughout the world would turn Equestria upside down. Before Celestia, Nightmare Moon, before all of it, there was a great empire that was far beyond Equestria's own. And it left a massive legacy that would passed down as myths and legends, and the truth would only be rediscovered three thousand years later. It would prove strange habits, names of cities, languages, technology, engineering, everything Equestrian, unoriginal. But the ruling class of Equestria has banned any further research on the thousands of sites that could be traced to the myths. Only the truly daring and adventurous would dare break the law to find out if those ancient legends and creatures, in a time before ponies, were true. And Lyra Heartstrings believes in the ancients' existence, and embarks on a journey to prove it.
Cut me some slack bro, this is my first fanfic.
Teen for Foul Language
Canceled, I didn't like how I made it turn out and, if you can follow me here, my views of FiM changed and don't fit in with the story.
Plus, it's flat out hard to write a full fledged fanfiction when you are a struggling AP student.

The scenery of nature is truly magical. The wildlife, the forest, the vegetation and the ground only touched by nature itself. Harmony...
Harmony?... Well, the residents of this world are thinking a bit different about this place.
What's sure, one thing isn't the same. A creature, not created for this world, but finds himself quite familiar in this environment. Walking on his journey to find his way back home.
Carrying in his hand something, neither his nor this world ever saw before.

An ODST and his squad are sent through slipspace to a place known as Equestria. When another slipspace hole opens up, containing covenant dropships filled with the various species, will they be able to protect this planet from the monsters that were destroying their own?

He is a college drop-out part-time worker. He is a dentistry student. Together, they are two total twats with no ambitions to go further then the next game, comic book or puff.

And now, they are ponies. Under the names of Lucky Chance and Midnight Watch they must find a way back to the human world using their extensive knowledge of the television show, the Laws of Narrative and sarcasm.
Will they be able to rise above themselves and face the many challenges that await them? Will they be able to figure out the true meaning of Friendship? Will they be able to not murder each other or themselves while doing so? Do they even want to go back?

Cover Image by CenturionFox13. Proofread by Letedwend