Disclaimer: I do not own MLP or Portal.

Summary: Twilight Sparkle was enjoying her evening when she sees something she shouldn't have. Something that should have been destroyed 7 years ago. She and her friends embark on a journey through Aperture Science, determined to find the truth. But how can they, when it's buried by lies?

Twilight Sparkle looked outside her window at the rain that cascaded down around the library. The roaring of the wind was deafening, but she allowed it to whip her mane around her face.

Her magenta eyes surveyed the scene outside. Although her house was located on the edge of Ponyville, she could still faintly make out the outline of the town square. Then she saw it. A red light, faintly glowing in the darkness. She squinted to make sure she wasn't dreaming. Nope. Not dreaming.

What was that? Then the beam of red light…moved. Twilight blinked rapidly, and then hurried downstairs. Whatever it was, she didn't have a good feeling about it. Yelling a goodbye to Spike, she cantered out of the library, and began her battle against the howling winds.

Struggling to place one hoof in front of the other, she slowly made her way to the town square. She saw the red light again, as it made its path over the buildings. Suddenly, a voice called out to her. "Who's there?"

Twilight blinked, and looked around. Nopony was there. Suddenly the red light darted over to her chest, and stayed there. Twilight stayed perfectly still, except for the fact her horn was now surrounded by magical energy.

"Hey you! There you are, friend." The voice called again. The voice sent a shiver down Twilight's spine. "I'm different!" Suddenly something hit Twilight. The red light! She saw where it was coming from. A small white machine stood about 10 yards away from her. Three red prongs protruded out of its body, keeping it upright. A small antennae emerged from what she supposed was the main body.

What was most shocking about the strange machine was the red glowing eye in the center of the main body. It was sending out a laser beam of red light, which was currently aimed at Twilight's chest. "I'm different." It called again, this time softer. The rain was still lashing against Twilight's coat, and making soft plip, plip, plip, noises against the machines white coating.

Twilight approached the machine, eyeing it warily. Using her magic, she picked it up, and carried it to an awning. "Thank you." It said, sounding grateful. "Wh…What are you?" Twilight asked, looking at it, curiosity getting the best of her. The red eye looked her up and down. "She's back. Her name was Caroline. They forced her to do it." It said softly, a sad sound lacing it's voice.

Twilight blinked. She walked around the machine, until she spotted a faded logo on it's side. It was almost like a circle. The words "Aperture Laboratories" were still visible, along with some smaller lettering. Leaning closer, Twilight's horn cast some light on the machines side. "Sentry Turret…" she murmured out loud.

"Who's Caroline?" She asked herself, thinking back to the turret's previous statement. "What is Aperture Laboratories anyway?" The machine spoke again, this time more urgently, as it's words were more hurried. "You need to find her! Find Che-" the last words the machine spoke were abruptly cut off.

Twilight stared at the turret in front of her. "Find who?" she asked curiously. The machine did not answer, but the eye started to flicker. Suddenly, another voice became clear. It was obviously feminine, and it did not sound happy. "Well. It seems that the Oracle Turret has finally found someone to speak it's last words to."

Twilight took a step back. "Wh…Who are you?" She asked, not knowing if the disembodied voice could hear her. "Me?" The voice sounded surprised. "Don't play games with me Chell. Although, your voice does sound quite different from the last time we spoke."

"Chell…" Twilight murmured. "I'm not Chell. I am Twilight Sparkle of Equestria." The voice laughed. "Equestria? That's ridiculous. You make it sound as though there's a land run by ponies!" Twilight glared at the machine. "You're kidding me…right?" the voice asked. "No." Twilight responded, peeved. "Now. Who are you?"

"I am the Genetic Lifeform and Disc Operating System." The voice replied snootily. "You may call my GLaDOS. I am the most advanced AI in the world, and I am now apparently speaking to a pony." "Unicorn." Twilight corrected. "I'm so sorry. A unicorn." The voice responded sarcastically.

"You know? I could use some more test subjects…" GLaDOS muttered half to herself. "Test subjects?" Twilight echoed. "Oh yes." GLaDOS purred. "You know, the kind of people who are smart, and can think things through. The kind of people who always make logical decisions. The kind of people like you."

"How do you know so much about me?" Twilight asked, a little scared now. "Your name is Twilight Sparkle, you are a mare, you are Princess Celestia's student, you are the Element of Magic, you are a unicorn with a lavender coat and a dark purple mane with a lighter purple streak running through it along with a pink streak. You are possibly the most skilled unicorn in all of Equestria, you singlehandedly vanquished an Ursa Minor, you have two assistants named Spike and Owlowiscious, and your best friends are Rainbow Dash, Fluttershy, Pinkie Pie, Rarity, Applejack, and Princess Luna." GLaDOS stated.

"That doesn't answer my question." Twilight muttered. "I have my ways." GLaDOS replied snootily. Twilight rolled her eyes. "So. What was that…sentry turret thing?" the unicorn asked curiously. "Oh that?" the AI replied, disgust evident in her voice. "That…was the Oracle Turret, also known as the Prophecy Turret. It is a defect, never meant to be made. However, somehow it made it off the assembly line."

"You don't think very highly of it do you?" Twilight remarked. There was silence. Then a small snort came over the line. "I am the most massive collection of wisdom on the planet Earth. And I hate. It. It must be for a reason, don't you think?" Twilight was slightly taken aback by the hatred in the voice of the computer. "O…ok…" she stammered.

"Anyway." GLaDOS continued. "What do you say about my offer to test?" Twilight blinked. "I…don't know. What will my friends think?" She mused. GLaDOS let out another catlike purr. "They could always come and test with you in Aperture you know. I could test them each on their respective skills, earth ponies for their strength, pegasi for their speed, and unicorns for their smarts and problem-solving."

There was a bright flash of light, and suddenly the five other ponies were standing next to Twilight around the turret, underneath the overhang of the building. Looking up so fast she nearly pulled a muscle, Twilight saw five orange ovals open in what seemed to be only the white part of the building. "Thank goodness that your race uses moon dust as a base for some of the paint. Otherwise how would I get you to Aperture?" GLaDOS said, sounding obviously relieved.

The five other ponies looked very confused, and Rarity started to whine. "Twiiiilight! I'm getting my hooves dirty!" There was complete silence from GLaDOS and then she said softly. "Ok. Maybe that one can stay here." Applejack stared at the machine. "Did that thing jus' talk?" she asked. Twilight sighed. This was going to take a lot of explaining. GLaDOS launched into a full-blown explanation of Aperture Science, and what they would be doing.

"Rainbow Dash, you would of course be tested on agility and speed." At this, Rainbow puffed out her chest. "Fluttershy, you would be tested on the effects of treating these two marshmallows with kindness, rather then blowing them up." At this, a picture of two robots nearly twice the size of the turret appeared in the turret's dim optic. "The tall one is P-Body, I call him Orange, and the shorter one is Atlas. I call him Blue. They talk in beeps and clicks, you will be given a translator in order to understand them."

Fluttershy looked very happy that she would not be doing something that required speed. "Pinkie Pie, you will be tested on how far equines can actually jump, and other such stunts you can pull that defy all laws of physics." Pinkie bounced happily. "Applejack, you will be tested on strength and speed." Applejack nodded, looking determined.

"Rarity, you will first redesign the currently vulgar testing outfits. Then you will assist the non-corrupted personality cores with organizing and keeping track of the test scores." Rarity looked positively ecstatic that she did not have to get her hooves dirty.

"Twilight Sparkle..." GLaDOS trailed off. "You shall first come to my chamber where we shall discuss your testing possibilities. It has been…many years since I have had someone with as much potential as you." Twilight felt honored to be praised by the computer, almost as honored as she felt when the Princess praised her.

"Do…do we need to take anything with us?" Fluttershy asked quietly, her voice barely above a whisper. "No." GLaDOS replied. "You shall be well taken care of at the Enrichment Center. Are you ready to depart?" Everypony looked around at each other. Various levels of apprehension and nervousness were reflected in their eyes, but no one backed out. "Yes." Twilight said.

"Then…Hello and welcome to Aperture Science." GLaDOS said, and Twilight could imagine a smile on her face. If she had one that is. "Bu-" Applejack started, only to be cut off as a large blue oval appeared underneath each of them, and they plummeted towards, blackness.

A/N: There. The first chapter is done! Should I do more, or just abandon it? I really don't know yet. I'm really getting into the groove of writing for GLaDOS, and am looking forward to creating all her snarktastic remarks in the future should I get enough reviews.

If I get THREE (3) reviews, I will start writing the next chapter! No sooner, no later. If I do not get three reviews in a month, this story goes bye-bye. Oki doki loki?

Thanks for reading.

-TF