Lyra Heartstings is a pony with an obsession. Humans, mythical creatures from ancient history. Before now, she was just a theorist, a madmare. But with the discovery of the crystal caves beneath Canterlot, all the clues finally make sense. Now it's up to one pony to brave the depths, the fury of Equestria's finest at her hooves, and find the truth.

The United Nations Embassy, Canterlot. Dedicated to promoting peaceful exchange-- economic, technological, cultural-- between humans and equines. But when a terrorist's plot ignites a firestorm of hidden racial-tension, the Embassy's eccentric, multi-species team of political operatives must scramble to forestall disaster. Can they hold together their nascent alliance and prevent First Contact from becoming a war between technology and magic?

The Human Liberation Front. An organization of terrorists, xenophobes, and bigots. An organization dedicated to the destruction of ponykind. An organization against the peaceful coexistence of two species. If the peace and love of Equestria is to help a shattered humanity, this evil group must be eliminated.
But to Jack Beckett and others, that couldn't be farther from the truth.

For OPT-related material not in the main story itself, read Side Stories.

Cancelled

"I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man."
-Thomas Jefferson

Three hundred years ago, Equestria tried to assimilate Earth.
They failed. They fled, rather than face justice.
We moved on. We conquered the stars, we made a civilization that spans across the infinite void. We built true harmony between species.
We thought we'd seen the last of Celestia, but as a desperate mobile colony on the fringes of known space came to discover, we were wrong.

It is time to finish what was started by our forefathers.

Based on TCB: Not Alone, by Starman Ghost.

EDIT: Following Starman Ghost's deleting of Not Alone, I've replaced the above link with one leading to a PDF file uploaded to mediafire.

EDIT (14/04/2014): The character of Evening Star was originally created by Starman Ghost. I am using her without his permission.

When Equestria accidentally opened a portal to another world, they discovered a new species: humans. Their arrival changed the world. For the Equestrian Ponies, it heralded a great cultural and technological jump needed from their stagnating way of life. For the Gryphons, however, they represented something baser: an opportunity to increase food stock and finally have a 'friendlier' predator species to ally themselves with.

For Gilda, one of the the humans was Ancestor-sent, a soul she would protect for bringing much joy to her life. And when a chain of events force her to accompany her human to Equestria, she recalls the circumstances of their meeting, the trials they pass through, the friendship forged through fire, and love born out of understanding under the harsh skies of the Kingdom.

This is her story.

"You are mine!"

~ Grizelda Behertz

Story set in The Gentlemanverse.

The Equestrian Critics Society gave this story the initial score of 8.5/10. (Full Review)

A one-shot story of the history of the Gryphon Kingdom can be found here.

OtterMatt's WRITE Review. Score:

Added to Canterlot's Finest

The star system Omega Centauri was just another oddity on a map to scientists in the not too distant future. However when they found the star was orbiting an earth-sized, earth-like planet instead of a black hole as its motion had suggested, a mission was scrambled to investigate this most unusual of celestial behaviors.

Hamstrung by politics, and nearly crippled before it began, the 'Lone Ranger' mission was reduced to just one crew member and left to his own devices.

These are the logs of Arrow 18 and its lone commander. This information is classified TOP SECRET by the Global Space Agency.

Do NOT tell the princess.

The Princesses find an alien creature barely clinging to life at the scene of a terrifying crash. Can the Combined Power of the Elements of Harmony save it, or more importantly, should they save it? Will the arrival of this strange creature tear Equestria apart?

TV Tropes
https://tvtropes.org/pmwiki/pmwiki.php/FanFic/Article2

The doctor no longer travels all through space and time. After seeing the worst of himself and humanity he finds himself In Equestria, right outside of Ponyville. Ironically the Tardis is perfectly fine for once, but the Doctor no longer is.
The Days turn into years and the doctor is now a facet of Ponyville. Just when the Doctor thinks he has truly found a place he never wants to leave, a certain Rainbow pegasus comes to him with a desperate plea. This is a crossover with Doctor Who and My little Dashie. I don't own jack squat but I'll be damned if thats ever stopped me.

It's funny how a random whim can turn out to cause the most profound encounters in a person's life. By attempting a bit of magic, I was able to get the once in a lifetime chance to talk with actual royalty! Only, royalty from another world...

There comes a point when you can no longer run from the things you've done. Ryan Williams believes that he has reached this point, but sometimes, just as we are about to close one door, another opens before us, changing our lives in ways we could never have imagined.

Update: Redemption now has a live reading! Done by Teraunce, you can find it here: https://youtu.be/W4vLoB3Lbk0
Go give it (and his channel) some love :D