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.

Humans.

Truth or myth? Ancient lost civilization or just an old pony's tale?

No pony has ever seen one, and most haven't even heard of them. But Lyra knows that these wonderful creatures are more than just old legends, and she's going to find out... and possibly drive her roommate insane in the process.

Applejack has taken a job on Earth, and agrees to host the Crusaders for a visit. When an emergency comes up, the fillies are left to take care of themselves.

A comedy.

There is a sequel, and a threequel to this...

For the longest time, peace settled in New York City. Young Peter Parker, otherwise known as the Amazing Spider-Man, got a long, relaxing break. No goblins, no rhinos, no lizards. But this will all change, as it always does for Spider-Man. He must save the day again, but this time, things have changed. Dr. Octopus has created a universal traveling vortex, that can teleport any being to a new dimension. Spider-Man must seek the help of Madam Web to grab hold of the new land he has fallen to: Equestria.
Adventure, and Action will pursue.

The Princesses find an alien creature barely clinging to life at the scene of a terrifying crash. Can the Combined Power of the Elements of Harmony save it, or more importantly, should they save it? Will the arrival of this strange creature tear Equestria apart?

TV Tropes
https://tvtropes.org/pmwiki/pmwiki.php/FanFic/Article2