After the fall of Earth, the Solar Empire turned its gaze towards the multiverse. World after world collapsed under the might of the empire and its ponification serum. All in the name of Harmony and the creation of the Perfect Race.

Now, the Solar Tyrant has set her sights on yet another planet. A planet unlike any she has encountered before, where it's races are united and magic coexists with technology.

Concordia.

Will the races of Concordia prevail against the monstrous might of the Empire? Or will they suffer a fate worse than death like those who came before?

For Lt. Blanco and his company, the mission was suppose to be a simple operation. Drop down on the planet's surface, protect the scientist while he investigates the strange energy signatures, then get out. How was he to expect that he will end up with a first contact situation?

This story is a sequel to Friendship is Grievous

The brutal Clone Wars have at last come to an end. The Separatists are no more, and from the ashes of the Galactic Republic, the Galactic Empire has emerged. Now, the ponies of Equestria must choose their path through a dark and terrible time.

TV Tropes page.

Cover art by Mix-up over at his his deviantart.

A/N: This is based on the Koala patches of the indie game Starbound. The game has since seen a full release and things have changed. These changes will be nodded to, but otherwise do not appear in the story.

Princess Twilight Sparkle is given the honor of being the first pony on all of Equus to engage in interstellar travel. Her mission: to explore unknown space, discover new planets, find new life, boldly go where nopony has gone before, and report back her findings five years in the future.

Things go wrong during her flight, and she soon finds herself stranded above a planet many worlds away from her home, with no fuel and dwindling power. If she wants to survive, she has to gather resources from the planet below. She slowly starts to develop her survival skills, but along the way, she encounters a friend who can help.

Jack Thomas, a "human" from a planet called "Earth," happens to be exploring space as well, and he seems to have a head start in figuring out where exactly she's at. Together, the two of them set out to find a way to return Twilight to her home.

NOTICE: Gore will be minor, and will appear most prominently in later chapters.

09 June 2014: 100 likes, 8 dislikes! Thanks a bunch, you guys!
05 October 2014: Featured! Thanks, guys!
02 April 2015: Computer Science milsetone! 128 likes! That's 2 to the 7th, or 80 in hexadecimal! Only 127 more until I can say I have FF likes!

Princess Luna left some things in the moon when she returned after her thousand year banishment. To recover these forgotten items, the Lunar Recovery Program was created. But on the first launch, something goes wrong. The controls break and the crew finds themselves on a planet inhabited by an advanced bipedal species.

This story is a sequel to Better Living Through Science and Ponies

THIS STORY IS CURRENTLY BEING REWRITTEN. PLEASE READ:
I've decided to rewrite this entire story. Considering that I began this project with almost no creative writing experience, I was bound to make some pretty bad mistakes. The story flow is not well organized, and there is an unhealthy amount of redundancy and poor pacing, as well as some pretty important things that I should have included. I intend to address these issues to the best of my ability, but it will be a long and arduous task. This story means a lot to me, so I want it to be more than the mere amateur mediocrity that it resembles. So, give it a read if you want, but keep in mind that it will change. I recommend that you put this on your read later list in the meantime.

This is a Portal 2 crossover. If you haven't played Portal 2, please do that first. Then read the prequel if you haven't done that either.

After Chell finally escaped the confines of Aperture Science, a freak portal mishap down below transported her, along with the entire Enrichment Center, to the land of Equestria. Upon entering this world, she was transformed into a pony. In a strange body and in a strange land, Chell was fortunate enough to be accepted by the ponies of Ponyville, and she lived out a new life contently among the ponies.

But that peace was not to last, for GLaDOS took a particular interest in the ponies of Equestria, and after two weeks of preparation, she launched a surprise attack and kidnapped 300 ponies to serve as test subjects, including Chell's friends and the princesses themselves. Once GLaDOS had them, she subjected them psychological torture. To save her friends, Chell made her way into the one place she hoped never to see again. In doing so, she freed the ponies, defeated GLaDOS in battle, and helped bring about the destruction of the facility. Although this made Chell a hero, she paid a terrible price in that brutal fight.

Beaten, battered, and traumatized, Chell spent months recovering from her wounds. After returning home from the hospital, all she wants is to once again live a normal life in Ponyville, but to do that, she must first heal from her wounds, both physical and psychological.

At the same time, GLaDOS herself has survived Aperture's destruction. With nothing left but herself, she vows to get back to testing. Though she faces an uphill climb, she is determined to see her facility rebuilt and the testing resume, and will stop at nothing to achieve this.

Has a TV Tropes page (will need to be updated after rewrite)

The works that this fanfiction is based on are properties of Hasbro and Valve. I would like to thank Pen Stroke for writing the original story and Flyer for his assistance and advice.

Please note, this is an unofficial sequel. I have received permission from Pen Stroke, but it is not canon to the original. I hope you enjoy it, but keep in mind that this is a fan work (of a fan work), and Pen Stroke holds the rights to the original story.

During Wheatley's time in charge of Aperture Laboratories, he manages to dispose of a Turret who was bothering him. What he didn't know is that he sent the turret into another dimension. The shaken turret awakes as a pony in Ponyville, with no clue with what she is or how to survive.

Warning: Some Portal 2 Spoilers. Read at your own risk.
A Portal, MLP Crossover.

In the magical land of Equestria, two alicorn sisters raise the Sun and the Moon every day to give the world a night and day cycle, basic for the survival of life. There are also two alicorns who rule over two very core aspects of life and harmony itself. Those are Love and Friendship. While not as ancient as the two sisters, all princesses are essential to the world's balance.
This balance is also sustained by the hard-working ponies, who make the seasons change and manage the weather to fit their needs, so everypony has enough food and water, and every animal is also attended to assure that any of them are caught in the changes of seasons.

But what about the planet itself? What about Mother Nature?
This is the question that Gaia asks when she arrives to this foreign world. After so much work her son persuaded her to take a long vacation in Equestria, saying that she needed one and assuring her that he would be in charge now, and she must take a break. But what can a several billion-year old alicorn possibly do to pass her time in this land?

(SimEarth/MLP Crossover)
(Timelife of Gaia's life 'till the start of the story)

Princess Luna, Mistress of the Moon, co-ruler of Equestria, is utterly bored, and tired of dealing with the bureaucracy. When she happens upon an uncompleted spell that promises access to other worlds, she finds a project that engages her as seldom before. Yet, some worlds are not so pleasant and safe as Equestria, and Luna is about to find out how denizens of one of the more dangerous realms entertain themselves as she is thrust into a bloodsport like no other.

The Tournament awaits.

A crossover with Unreal Tournament, specifically UT2k4, which I've come to regard as my personal favorite of the series.
There is some gore, but nothing worse than your usual FPS game made in the last 10 years or so. Rated Teen for that, and some foul language. (Because it wouldn't be UT without the smacktalk.)

Consider this as the soundtrack. Because that's exactly what it is.for Deck 17. So, freakin' EPIC.

Cover art commissioned from Atryl, who is a demigod of Art. Seriously, he's awesome. Go throw money at him.

This story is a sequel to Splashdown

Things have been shaken up by Luna's surprise appearance and subsequent journey to Earth. As the world tries to find its footing in a universe much different then they expected, and as the strange phenomenon of "magic" begins to spread, everyone's having to make some accommodations-- Luna not least, with the Nightmare now an equal holder of her own body; not a great arrangement. But among all this, the attack onboard Hornet lurks, begging the question: Who was behind it? What do they want? And is it already too late to stop it?