Mercy Andromeda had always wanted to go to space, ever since she was a little filly. When she wakes up to her life-long dream after a devastating act of sabotage from the zebras, she finds a horror story in the aftermath. She forgets her dream and goes down to talk some sense into the ponies below.

No pony seems to take her seriously, and she resorts to using her highly advanced "assets" to get them to listen. Between pink clouds, raiders, and comic books, she'll prove to the wasteland that she's a mare worth their attention.

How will the wasteland survive when a mare with conservative views and ideals descends upon them looking like she just jumped out of a comic book?

Based on the story by Kkat: http://www.fimfiction.net/story/119190/fallout-equestria

This is a fic based on the Time Loop Files, the format of which was first codified by Innortal on fanfiction.net.
Here's a brief guide.
The basic idea is, one character (the Anchor, usually the main character of a fictional setting) is looping back to the very first moments of their parent series every time either they die or some kind of time limit expires. They of course end up monumentally stir crazy given enough time.
Eventually others start to loop as well.
The reset is not always perfect. Sometimes a loop's history will be different to the "prime" loop, or canonical plot.
"Crossover" or "Fusion" loops also occur, randomly. These can involve the home loopers having a guest, or the anchor for one universe spending time in another, or replacements of one character by another.
Vacation Loops are where the Anchor (or others) decide/s "buck it" and lets off steam by doing whatever comes to mind. There's little or no attempt to maintain the original timeline.

In addition, and particularly more recently, it should be known that this story has a collaborative element to it - people may submit loop ideas or loops, ideally at the Spacebattles thread (a link to the current version of which is on the Trope page), and they may become included.

There's two page image options, thanks to Filraen - the current page image has been edited by the original creator from this work of theirs.. The other one is here:
http://hourglass-vectors.deviantart.com/art/MLP-Loops-466030169

Officially complete!

Trouble is brewing in Equestria, and Spider-Man is summoned to save the day! However, he takes the form of a pony upon his arrival and slowly starts to lose his powers. Now as Peter Pony Parker, he must become Equestria's new hero as the Amazing Spider-Mane, but with past failures haunting his mind, will somepony be able to give him the happiness he deserves and save him from a prophecy that ends with his death?

Across Equestria and through Earth, two hearts will join together, but one may die to ensure the survival of reality...

Cover image drawn by jmkplover and colored by Saljian

Official Theme Song done by XAVI- Playful Banter

It even has a Tvtropes page!

Spiders and Magic: Rise of Spider-Mane

The Cutie Mark Crusaders know that Babs Seed was bullied back in Manehatten, but how bad could things really have been? And how does Babs feel about returning to the city and the ponies who have hurt her the most?

(Note: to avoid confusion, the first few chapters of this story deal with past events that occurred before "One Bad Apple". I will add an Author's Note to the chapter that begins the "present" state of events and continues forward from there.)

Followed by Sweet Apple Anthology and Severed Roots.

Now with a TVTropes page! Thanks to vren55 for putting it up!

Rated Teen for some violence, language, and darker elements.