A slight combination of Amnesia: the dark descent and FiM, the main character (not given a name initially) finds herself in the Ponyville Asylum which is under the direction of a Twilight Sparkle. She then must contend with the denizens of the Asylum as she attempts to find a way out of the twisted place, by any means necessary.

As Twilight goes deeper into darkness, she is lost in her own descent. Going deeper into the Royal Castle which was taken over by the Shadow of Chaos. Betrayed by her own teacher, Princess Celestia, she must find her way toward the heart of the castle. Her friends are no where to be found. Finding a note that only tells her that the friends she knew, may be changed forever. Everyone she loves is in grave danger. All because of her. She must fix this large error that she has created. The shadow she has unleashed. Losing her memory she will go through the descent into darkness... (Story line is based on actual game)

Note: This story is currently undergoing rewrites. A blog will be posted later describing some of these changes.

As I wake up, my head aches and my throat burns. Where am I? How did I get here?

Blurry memories of pain and suffering fade in and out as I try to identify my surroundings. There is a vague familiarity to the place but I don't know why.

I begin to ask myself many things. What am I doing here? Where is "here"? Why can't I remember anything? Why can I not even remember my name?

All the same, I can only manage to recall but a few precious memories. Something is very wrong with this place. And my friends—friends whose names I do not even remember—are in terrible danger. Something very bad has happened to this place and everypony in it. My body becomes cold and I am denied every other thought except for one:

I must escape.

An adaptation of Amnesia: The Dark Descent in the world of MLP:FiM. Formerly titled "Amnesia: The Equine's Shadow"; name was changed, but is not final. Rewrites are in-progress.

Reading by CrazedRambling (very outdated): I / II / III / IV / V / VI

"M-my name... yes, that's definitely something I should hold onto... Twilight Sparkle,
my name is Twilight Sparkle, and I'm trapped here... please... somepony help me... Something is
hunting me... stalking me through the shadows, I can't escape this place, The Mist won't let me
leave, oh i just want to go home..."

-

Inspired by Amnesia The Dark Descent, clearly. Watch through the eyes of Twilight Sparkle as she fights against the encroaching shadows, struggles to restore her memory and unravel the mystery of Old Canterlot Castle.

After Rainbow Dash sincerely apologizes to the Spirit of Chaos, they start to bond as good friends. However, after a long chat, Rainbow starts to feel an unusual pain in her heart she can't fight. Who knew how much she actually could feel for somepony- or some draconequus- she'd used to hate?

Now a rainbow's tale isn't quite as nice as the story we knew of sugar and spice.
But a rainbow's easy once you get to know it with the help of the magic of a pegasus device.

We all know the story of the Rainbow Factory, of how Rainbow Dash had gone mad and done unspeakable horrors. But how did it all come to that? How was it that Rainbow Dash, known for her loyalty, descended into such madness? This is Rainbow Dash's story of losing herself to that dreaded factory, for as we all know, in the rainbow factory not a single soul gets through.

This is a prequel to 'Rainbow Factory' by Aurora Dawn: https://docs.google.com/document/d/1td5r9BGGA7l2-rnlFTnVrJN2NdZclcVWUMoCqaSujnM/edit?hl=en_GB

which was based on the song 'Rainbow Factory' by WoodenToaster: http://www.youtube.com/watch?v=YRx_iXgLAyw

This story is a sequel to Amnesia: The Pony Machine (Teaser)

Teddy, Ace, and Sweet Heart were just some foals with rich parents whom were dragged along to a tour of some rich mare's facility.

They'd never imagined they would be the only ones who could stop the horror on going underneath.

What would happen if Spike was born earlier than in the show and was raised by dragons instead of ponies? What if his teacher told him to come with him to meet with Celestia and the recently returned Luna. How will the princesses and Elements of Harmony handle a blunt, sarcastic, and strong young dragon. And how would this affect a certain shy Pegasus who is afraid of dragons.

A.U./Anthro/ Slow FlutterSpike

Edited by Starblade

The life of a Princess of Equestria is always a stressful one, whether you are an experienced one or not. Sometimes you need to get away from it all. That is exactly what Twilight and Cadence thought when they decided to take a trip to the Hoofwian Islands just the two of them. The vacation is suppose to be about having fun, but deep down one of them wants a bit more than that. Their only concern, though, is how the other will react to this.

**********
(19/10/2013)
Holy sweet mother of Celestia!!! Featured...I honestly didn't expect that. Thanks everyone who supported the fic

Edited by: Avatar of Shadow, TimeLord_Whooves, Elric of Melnipony, and The Abyss

Fluttershy will be trying to find the 8 pages with Doctor whooves, Derpy and Angel

( also check out luigi117's slendermane story. It has more detail.)