This is the first book of The Humanity Within Trilogy. Its sequel is What I've Done.

I wasn't always like this, a monster, running through the woods on an alien planet. I was once a man. I had dreams, a girlfriend, and a great job.
Then They came. In the middle of the night, They scooped me from my home, and... changed me.

Now I'm a beast, a demon the like of which the world I've become stranded on has never seen before, scraping by on the fringes of society, hiding from the natives, and doing my best to avoid notice.

After all, who could ever be friends with a monster?

Cover Image done by the very talented PaintSplotch! You can find his FimFic account here.
And here is his DeviantArt Account!
Now 100% approved by Twilight's Library!
Mad props to my prereaders:
ThatPonyWithASword.
Admiral Applejack.
JXWheeler

A human finds himself in Equestria under very unpleasant circumstances with no explanation.
His reaction: get the heck out of Dodge and start a new life where Equestria and her ponies can't reach him.
But an alicorn's reach is long and the events which brought him here and his treatment in Canterlot are not so easily forgotten by those who did it. How does one say 'go away' to an immortal goddess?

Yay! Featured, thank you all.
A TV Tropes page
Revised 08/31/14 for clarity and grammatical issues, no events changed. I am working on a sequel, but it will be from Fancy's POV.
P.S. Green is NOT Lyra. There are other green unicorns.

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!)

A long, long time ago, there was a knight who set out on a noble quest to save a fair maiden and, if possible, slay the dragon keeping her captive.

Only... things don't always go as planned.

Many thanks to the incredibly talented hattonslayden for letting me use this picture for the cover art. Check out his work some time!

Update: featured? Oh my... I feel all tingly inside...

I'd heard about the TV show My Little Pony: Friendship is Magic from my college roommate who is way too into the show. Disturbingly so, actually, but good gravy I would never watch the darned thing! What am I, five? I've got better things to do with my time than watch a silly little girl's show. However, that didn't stop... something from transporting me into the world of the show, so here I am... in Equestria... trying to get home. This is gonna be interesting.

Special thanks to GuyFace, Jack Kellar, Storm Shaker, Spiffy McSquee, and Goober Trooper for helping me with this one!

You, a young human living in Canterlot, have never fit in with anyone. It's been years since you were found in Equestria, and you've become a small outcast in this world of ponies. Hiding away from everyone, you find solace in another strange being, a weird black bug-like filly that calls herself Chrysalis.

At first, Chrysalis loathed him; the dumb-as-a-brick woodspony who goes by the name of Evergreen. But through circumstance, he is her only savior. And slowly, she comes to love the simple pony and his way of life. But her life as a changeling keeps holding her back. Will there be a happily ever after for them? Or are they doomed for failure?

*Comments contain massive spoilers!*

Check out the Sequel, Antecedent! http://www.fimfiction.net/story/25117/Antecedent

Cover art by Ink-Flow!

Edited version helped along by Fernin and Burraku_Pansa.

Hope is the faith of the young. Losing everything she holds dear, Puppysmiles embarks on the adventure of her life to find her mother, her hopes of meeting her again driving her through the horrors of a world not of her making. Too bad the Wastelands doesn't care about hope.

Submitting to trials, tribulations, lies, misunderstanding, and pain. And all these things for one purpose. To Befriend the Night.

Coverart by: jjames10 (Tome Turner)
Thanks man!

Sequel out now: To Swoon the Stars

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!)