(A Persona Crossover, accessible to those who have not played the games)

There is a problem plaguing Ponyville. For countless fillies and colts, every single night is filled with visions of their greatest fears, and it always seems to be at the same time: just after midnight. There are even rumors of a dark world where Ponyville is shrouded in an impenetrable darkness, and everything is still, as if time itself has stopped. While parents brush it off as part of their childrens' nightmares, the real nightmare for Ponyville is about to begin...

Cornerstone, a new resident of Ponyville, would prefer to simply continue his work building and designing homes, rather than dwell on these rumors. Unfortunately, when a pair of murders rock the town, he and a certain six mares and dragon assistant all find themselves drawn into the mystery of this other world. Thus begins the race to find its origins, as well as the murderer using it for their own nefarious purposes. And it all starts with a single question:

"Just who are you?"

"Why, you're me... and I'm you."

Cover Art by the amazing Acceleron

This story is a sequel to Twilight's Inferno

This story is a sequel to Order of Shadows

Trixie has lost everything: her career, her fans, her precious wagon. If she can't pay her rent within a couple weeks, she won't even have a roof over her head. Things can't possibly get any worse... but then Princess Luna brushes her off in a dream. The Great and Powerful Trixie sees that as a challenge, and she doesn't back down from challenges!

Trixie gets far more than she bargained for, and she soon learns that her life can get much, much worse. Epic duels, mysteries at every turn, truths and lies mixed into each new discovery. Being Great and Powerful might not be enough. Perhaps what Trixie really needs...

...is to just be Trixie.

UPDATE 5/22/2014: Now featured on Equestria Daily! So much awesomeness.

More awesomer cover art commissioned from KorenCZ11!

The TvE Series
Chronologically from Top to Bottom
Order of Shadows
Twilight's Inferno
Trixie vs. Equestria

Mario continues his adventure to collect the power stars to stop the Koopa King from taking over the Universe. His journey takes him to the world of Equestria where he will find unique challenges and make a few new friends. Mario's arrival in Equestria will spark an adventure his new friends will never forget.

The awesome cover picture is by Primogenitor34 from deviantart.

Daring Do seeks a favor from her sister in Ponyville. Due to buried grudges, things quickly get out of hoof. She soon finds herself on her most perilous mission yet... with her biggest fan in the world. In the midst of truth and lies, loyalty and treachery, love and hate, one thing is clear ― some family situations are stranger than fiction.

The story extends in Through the Looking-glass and What Pinkie Found There and The Daughter Doo: Honorary Cutie Mark Crusader.

Many thanks to Honey Mead and statoose for their watchful and helpful pre-reading.

Ckat_Myla and statoose (CatNStat) have started an excellent reading of TSD.

[Eventually will be rebooted in a new story]

Rated [Teen] for F. Violence & Strong Language.

It's been ten years since she's been crowned princess, and during that time she's been rather... busy. Among moments of solving friendship problems and saving Equestria multiple times, she has destroyed the covenant, saved the Mushroom Kingdom and its princess, destroyed all the colossi in the Forbidden Land by the order of a sealed god, escaped Black Mesa, and many more heroic deeds. Yes, Twilight Sparkle can call herself a video game master of many genres. However, she never once touched the aspects of virtual reality MMO’s. That is until she started playing Equestrian Earth. With a whole digital world before her, Twilight felt that her adventures in the MMO would be her greatest adventure yet.
However, this adventure may prove to be the most dangerous as a powerful entity and its legion of hackers have taken over the world. Twilight Sparkle must unite with her fellow gamer friends if she is to prevent herself from getting a game over not just in the virtual world, but the real world. Adventure awaits in a land filled with monsters, allies, quests, rivals, imagination, friendship, and magic.

This is Equestrian Earth, let the games begin.

Story Description Credits to Rated Ponystar [an immense help!]
↓If you haven't, read Author Notes down below↓

Author Notes:
Ω Editors: ugugg93
∞ Edited chapters will be marked by a certain number of *s, indicating how many editors got to it
Ω Proof/Pre-readers: RemareShadows and Apuppy120, ultra1437, Genghis, and Willow the Pegasus
Ω A World Map of Equestrian Earth (and Equestria)
∞ (Password is mlp.)
Ω Also as a side note: I came up with the idea in the shower.
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Past Cover Arts
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1st Cover Art: The Great Six by Boxanor
2nd Cover Art: My Little Skyrim by Atrixy
3rd Cover Art: The Bannermares (and dragon) by latecustomer
Official Equestrian Earth Cover Art #1 [Landscape] by Midnight Sonare
Current Cover Art:
Official Equestrian Earth Cover Art #2 [Portrait] by Midnight Sonare

Fic's Group
Equestrian Earth Hubnet

Reviews
Ω SLthethird's review

A journey to become great and powerful...

Trixie strives to reach this ultimate goal; but rather than simply proclaiming her skill, she will be forced to overcome many obstacles and adapt to her changing circumstances in order to ensure her success. She must face the new challenges set before her; but when adversaries emerge, enemies-turned-friends may be Trixie's only hope.

Equestria is growing, and magical savant Twilight Sparkle is disgusted by the crime and corruption this change has brought. Her life is changed forever when she discovers the Death Note, a notebook with inexplicable and deadly powers. She uses this book to pass judgement on those she deems unworthy of life, aiming to create a perfect world free of crime. But when the two Princesses put their best pony on the case, a mysterious detective known only as L, a psychological game of cat and mouse erupts between the two.
Comments contain spoilers. Artwork by blu-red, opening by Anon3mous. Now with its own TV Tropes page.

Rainbow's hopes for a nice day off are dashed when she is awakened by a loud explosion, and goes to investigate, little did she know she and everypony in Equestria would find themselves caught up in a strange tale about invaders from another time, a dark and vengeful entity's return, and the means to stop him...

Earthbound/Mother 2, Equestria style! I know it's been done a few times before, but I thought I'd give it a try. A couple events are altered, added, and a few changed around, so that it can fit the characters and setting more rather then be a ponified walkthrough.

Now has a sequel!

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