Once upon a time, on the not-so-magical planet Earth, there was a US Marine who signed up to defend his country. He was assigned to a fire team, the fire team assigned to a squad and the squad assigned to a platoon. Together they defended the area surrounding a Forward Operating Base in Afghanistan from insurgents. If only it were that simple.

When lone Marine is transported to Equestria he finds a post-apocalyptic wasteland. With no orders, no resupply and seemingly no hope of return, he sets out to find what brought him here, and why.

Strong Language Warning: He swears like a Marine.
Disclaimer: I'm not a Marine

What do readers have to say about this story?

"[T]his has to be the dumbest sounding plot I've ever heard of. But my god do you take that and fuck it in its ass ... Its just so real and witty and genuine that the whole premise actually works!" ComprehensiveBrony

"Yes, it's human-in-Equestria, but it's good. ... the action scenes had me sitting on the edge of my seat" Tebee

Cover by me, background stock by DarkDragon774

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 an incident with the heart of Liberty, Niko Bellic finds himself awake in an unusual hospital. He quickly learns that he is no longer in Liberty City. His rough, gravely world is about to be turned upside down.

No memory of her past, what she's done, or where she is, Twilight wakes up to find herself alone, imprisoned by the crumbling walls of the castle. All she remembers is her name, where she lives, and that something supernatural is after her. With no other options, Twilight is forced to travel deeper into the structure. Not a soul in sight, she begins her journey into the dark stone corridors. Soon though, she'll find she's not alone...

NOTE: There may be spoilers in the comments. Read them at your own risk!

A mysterious viral outbreak grips Equestria, threatening the very life of the country. In an effort to stop the infection, Princess Celestia orders all individual settlements within Equestria to be quarantined. Can Twilight Sparkle, along with the other Elements of Harmony, figure out the cause of this horrific virus and put a stop to it? More importantly - can they survive?

Rated M for Violence, Adult Content and Language.

What if, instead of going to Ponyville, Twilight Sparkle left Canterlot to go to the Pony Mesa Research Facility?
What if, instead of fighting off Nightmare Moon, she fought off a Resonance Cascade?
And what if, instead of meeting her friends in preparation for the Summer Sun Celebration, she instead met them in the aftermath of the Resonance Cascade?

This is the story of Twilight Sparkle, as she takes on the role of Gordon Freeman from the original Half-Life, and the friends she meets along the way.

Thanks to HiveLordLusa for the picture.

Josh Schwartz is a normal human with a normal life. He has his computer, his TV, his pet cat, his love of sports, the works. Naturally, he doesn't approve or enjoy girly things that are obviously made for girls. However, when a mysterious and unexplainable series of events takes place, he finds himself in Equestria, a world with no humans and only ponies...well, mostly ponies. How will this sarcastic human boy adapt to this new world? And how will its residents take to their new visitor?

A short trip to Canterlot with Rainbow Dash and Applejack is the perfect opportunity for Twilight to test out her new long-distance Teleportation spell. But a nasty cold dashes the hopes of a quick trip, and makes the spell disappear in smoke: instead of arriving in Canterlot, the three find themselves in the nearby Everfree Forest, and discover that their location is not the only thing that went wrong.

While Rainbow has exchanged her wings and tail for a straw blond tail, Applejack has acquired a rainbow tail as well as a pair of strong, blue wings.

While Twilight attempts to find a spell to return the body parts to their rightful owners, the others must attempt to deal with this situation... and with their changing feelings.