Three years have passed since the War of the Wedding, when an invasion force assaulted Canterlot and revealed Changelings to the world. Fear, driven into the hearts of ponies, has given them a new boogeymare to hunt, it would seem.

To Vanessa and her family, it's life as usual one grey and gloomy Canterlot morning, though not for long...

After the reformation of the Changelings Twilight is questioning what her destiny is. Fate has it that she easedrops of Flash Sentry and discovers something, He's part of the Silver Enlightenment. She then investigates further.
Christian Fic and hints of FlashLight.

Complete from the moment. Have ideas to continue.

For over a thousand years the crystal ponies have been frozen in time by the curse of shadows, how lucky they are. While the crystal ponies are in deep slumber, King Sombra’s thoughts are restless.

Inspiration

Long ago, at the top of the world, Love ruled a magnificent frozen empire. Then the sun rose, and darkness fell.

* Now with an audio reading by Illya Leonov! *

* * *

Featured by Seattle's Angels:
"Horizon, taking almost wholesale the structure of T. S. Eliot’s The Love Song of J. Alfred Prufrock, has done something really incredible here. He’s managed to not only write some beautiful poetry about Sombra, Celestia, and the dichotomy of ice and fire, but tell a coherent story of longing and loss." – alexmagnet
"Melt is perhaps, by what I’ve seen, the best [poetry] this fandom has to offer." – RazgrizS57

"Highly Recommended" by Present Perfect

"This is one of the finest examples of literature produced by the fandom, a beautiful homage to T.S. Eliot." – Illya Leonov

In the alternate timeline where Sombra was not stopped, a human finds himself suddenly in Sombra's body... just after the dread tyrant has conquered Equestria. Now trapped in a world where just about everyone hates him, he must try to keep up the illusion that he is the villainous conqueror, while at the same time try to win over his new subjects.

However, this will not be so simple, as the real Sombra is not quite dead... and he is most definitely not happy.

Part of The Ocean Of Time series.

It is the year 2038, and the Earth is slowly being consumed by a space-borne monstrosity dubbed the Black Tide, which is using nanotechnology to remake the planet into something hideously alien.

Erin Olsen works for Project Harmonics, humanity's last-ditch effort to find a new world before the Tide can wipe them out. But when that world is found, and it turns out to be occupied, Erin will need to find the courage to face the unknown in order to save the inhabitants of both worlds.

(Many thanks to Easteu for the fantastic cover image for this story!)

Now with its own TV Tropes page

There is now a follow-up to this story: Sunflower - Side Projects
Sequel: Project Sunflower: Harmony

Jvarn, Kilm, and Hayt are all comrades in the Imperial Guard. Members of Veno Six's Sixth Regiment, they traveled space to fight the enemy's of the Imperium. During a routine boarding action, however, a Chaos trap pulls the three into a new world entirely.

Can they resist burning the xenos long enough to find a way home?

This story is a sequel to Stardust

Times are changing for Equestria as Twilight’s return brings with it news of people and cultures from beyond the peaceful world everypony knows. Aid and volunteers are freely offered to help the besieged humans of Earth because every Equestrian knows that’s what good friends do. Unfortunately, making friends can also have the unintended consequence of making enemies.

When the monsters besieging the humans strike at Equestria with a level of brutality not seen in over a thousand years, the cry for help is sent to all the kingdoms of the world. Honored allies step forth to fulfill ancient treaties and oaths. Enemies, old and new, bury their grievances. An alliance never before seen in Equestria will be created to combat the monsters from the void.

And because of these events, a grim but welcome sibling to the XCOM project is born.

(XCOM/FiM Crossover)
(Sequel to Stardust, which I recommend reading before starting this. Fortitude Amicitia and Broken aren't required reading but are supplemental to the storyline)
(Gore tag for blood and violence)
(Alternate Universe tag because of the divergence from canon that Stardust has caused)
(Uses elements of Season 4)
(Coverart produced by the amazing Carnelian!)
(Many thanks to Arzoo, BradTheBrony, Vandenbz and Setokaiva for prereading!)
(As of 03/07/2016, the prereading team consists of Arzoo, BradTheBrony, Noble Cause and Metallusionsismagic!)
(Complete with it's own TVTropes page as part of the Stardust continuity. Could use some updating!)
(Character tags will be added as chapters are added!)
(Featured 5/12/2014! Thanks folks!)
(Possible spoilers in the comments! BEWARE!)

This story is a sequel to Stardust

When Equestria’s newest member of royalty asks for aid to be offered to her friends from abroad, the best and the brightest volunteer to serve. Captain Steel Song of the Dusk Guard are immediately mobilized to help XCOM defend their world from the enemies that besiege them. However, their first joint operation with the humans takes a turn for the worse and they quickly find themselves fighting for their lives against the full force of the monsters that threaten Earth.

(Stardust/Dusk Guard crossover)
(Coverart provided by a friend of Viking ZX!)
(While familiarity with both stories isn’t required, it is recommended)
(Many thanks to Arzoo for pre-reading!)
(All screenshots can be found at XCOM.wikia.com)
(Featured on 3/13/2013. Thanks everyone!)
(Now has it's own section on TVTropes as part of the Stardust series!)

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!)