[Complete! With TVTropes apparently!]
Also, apparently, an animated trailer.

In a world of brass and steam, Twilight Sparkle had thought she had made a life-changing discovery with the invention of the telescope. For better or worse, she was correct.

Now her discovery has not only changed her life, but the lives of those she seeks out in her desperate attempt to contact the only other creature as lonely as Twilight herself.

It all would have been much simpler, but it had to be the one Twilight could only call The Mare on the Moon.

Decidedly not within walking distance, then.

[Featured on EQD before story was meant to be submitted. 4/03/2015]

[Editing team: Southpaw, Wolfvenom, Maskedferret, SwanSong and BluePaladin42, without whom this story would be a fraction of its current state.]
[Special thanks to Novel-Idea for the updated cover]

It had been nearly a year since you won that labor lottery. This job had quickly turned into the best thing that has ever happened to you and your family. From the Grestin checkpoint, you had seen it all; terrorist attacks, long-seperated lovers getting back together, people trying to smuggle drugs into the country...
None of that compares to the day a portal opens to an alternate dimension just outside the walls.
Which is bad, because inevitably that means more papers for you to check and double check.
But still, a job's a job. Might as well keep a straight face about it...
And remember:
Glory to Arstotzka.

The legends told of their return.

For over a decade Equestria has been beset by the dragons. Every year more villages vanish in flames, and the lonely cities stand as our last redoubt. Winter has gripped the world, and our hope is fading.

But the legends tell of another, a light in the darkness. The Dragonborn, a mythic warrior reborn with the power of the Voice, the only one who can stand against the dragons.

But when she appeared, she was not what we were expecting...

For little less than one thousand years, the species of Equestria had been a part of the Trade Order, sharing the millenium of peace of prosperity the humans had enjoyed.

Now, with the arrival of alien invaders and the return of ancient evils, that peace was been shattered. A people unused to war had to rediscover its ways and fight for their home. The Trader Emergency Coalition was born from this need.

Ten years have passed, and the sitation has improved to the point High Command has authorized a rotation of the forces, sending the weary first generation back to their homes, to rest and recover.

Meanwhile, a lavander unicorn mare who has never been on a planet is travelling to Equestria on behalf of her teacher...

For more information, see the [URL='http://forums.spacebattles.com/threads/friends-of-a-solar-empire-mlp-fim-soase-thread-mk3.220696/#post-7541443']thread on the Spacebattles forums.

[URL='http://tvtropes.org/pmwiki/pmwiki.php/FanFic/FriendsOfASolarEmpire']Now with tropes!

The royal court of Canterlot welcomes its newest member with open forelegs: the human philosopher Voltaire, from Earth.

On Earth, Voltaire is known as the greatest enemy of tyranny in the history of literature, and a legend in his own mind.

On Equestria, the court betting pool is giving him a week before the Princess banishes him to the Moon.

Note: This story doesn't have sequels per se, but there are a couple of short follow-ups set in the present day ("Parade Coverage" and "Secret Histories"), and a prequel of sorts in "At the Inn of the Prancing Pony".

TV Tropes page.

Isolated from her friends and taken prisoner in the middle of a war, Twilight must deal with the very real dangers of being percieved as an enemy as well as the nightmares of her arrival on 'Earth'. Can she overcome her own fears and the fears of her captors? Will the wayward unicorn's assistance be a boon or a curse to the 'humans?' Most importantly, will she ever find her way home?

"In short, it's a story of friendship and plasma rifles, with the emphasis on the friendship. The characters are well written, the XCOM setting is fleshed out very well, and the story is compelling. If you love XCOM, you'll love the story, but even if you've never heard of it, it's more than worth giving the first 3 chapters a read.

There's excellent action later on, but the real strength lies in the collision between the friendly and naive world of Twilight Sparkle and the desperate world of humans fighting a losing war for survival and willing to do anything to turn the tide."

--Arzoo

(XCOM/FiM crossover)
(Cover art commissioned by a friend and created by the magnificent FoxInShadow!)
(Original cover art by the amazing Carnelian can be viewed here!)
(Gore tag for blood and some violence)
(Many thanks to the studius OminousTen, Arzoo, xXFluttershyForeverXx and finally Setokaiva for giving my rambles a once-over)
(Now with it's own TV Tropes page! Get to tropin' folks!)

In the 31st Century, humankind has spread to thousands of planets in the Inner Sphere. Once united under the glorious banner of the Star League, the Successor States and their noble houses now fight bitter wars over the scraps of empire. When a JumpShip carrying a special task force from the Federated Suns suffers a catastrophic misjump, the occupants find themselves stranded above a strange, beautiful world at once alien and eerily familiar.

Meanwhile, in the peaceful realm of Equestria, Ponyville’s resident bookworm , Twilight Sparkle, has stumbled upon hints of a secret buried for centuries. A secret that may lay bare long-forgotten aspects of Pony history and culture.

Our story begins on the planet Valexa, where the beleaguered Militia has launched a last-ditch effort to call for help against overwhelming odds.

Written with those who are not familiar with the BattleTech/MechWarrior universe in mind.

In 2185, during his campaign against the Collectors, Commander Shepard discovered a previously unknown species whose origins predated any other race in the modern galaxy. Following a daring rescue from their ancient sanctuary, the Equestrian Herd was brought back into the galaxy where, for the first time in eons, they must walk their own path.

Knowing full well the terrible threat that lingers on the edge of the galaxy, the leader of this newly freed race fights to secure her people’s future while attempting to prepare for the storm on the horizon.

This is her story.
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The long awaited Sequel to Mass Effect 2: The Equestrian Equation This is a reader directed story. Your choices will shape events.
If you favorite, also like! It's one little button click that makes all the difference.

Also, this series has its own TVTropes page now! (Special thanks to user CrowMagnon for setting it up).

The Medallion of Light and the Medallion of Shadow are some of the most powerful yet obscure artifacts of antiquity. Created by a now-vanished cult of assassins, the two devices together give their bearer the incredible power to walk the worlds with but a single step.

Nefarious forces are closing in on both artifacts, and very little stands in their way. Heinrich Himmler's agents covet the medallions for the greater glory of the Third Reich. Ahuizotl's simply want their master to get what's coming to him: the world, and everything in it.

With the fate of all good people and ponies in doubt, one thing's for certain: saving two worlds would be one hell of an adventure. And if adventure has a name, it must be Daring Do… or is that Indiana Jones?

Will our heroes win the day? Find out in... Daring Do and the Medallion of Shadow! Or, Indiana Jones and the Medallion of Light!

NOTE: there will be some violence in this story, but nothing more than you would expect to see in an Indiana Jones movie-- so I didn't check the "gore" content box.

Artwork by Tzelly-el.

Special thanks to SapphireStarlightPony & Rated Ponystar for helping with the brainstorming on this one.

Thanks to this stupid thing I've had the Indiana Jones theme song stuck in my head for like the past four days and I am about to claw my eyes out AAAAAAAHHHHH @_@

During an attempt to escape from her lunar prison, Nightmare Moon unwittingly pulls something into her dimension that doesn't belong. In doing so, she sows the seeds of her own defeat. Now Luna must deal with the consequences of her other persona's actions.

An Ender's Game crossover exploring common themes of regret and redemption, this story takes place parallel to Seasons 1 and 2. Knowledge of the book is NOT required.

Thanks go to the wonderful and talented Companda for creating a beautiful cover image. The FIMFiction-sized version really does not do it justice. Please take the time to view it on DeviantArt by clicking the source link; you'll be amazed at the level of detail she put into this picture.