An MLP/Warhammer 40K Crossover

The Iron Warriors 38th Company has landed in Equestria, entrenching themselves like a barbed hook. They hunt the aliens of the Tau Empire, intent on destruction and pillage.
A small squad is dispatched on a reconnaissance mission, only to find that there is intelligent life on this world besides the feuding space-farers.
Will these improbably adorable and friendly equine aliens turn the damned warriors of Chaos from their blood-soaked path, cleansing them of their dark legacy with the magic of friendship and harmony?

No.
No, that isn't happening.
EXPLOSIONS!!

(Dark humor warning; limited grimdark themes)
(Cover art by Nicholas Kay)
(This series now has its own TVtropes page!)
(This story is a contestant in the Tournament of Canterlot, a charity event to raise money for Syrian refugees! Go here for details and donations!)
(Featured on Equestria Daily 8/20/15 )

I should have refused to follow him for a night at the bar. I should have stayed at home. Why did I do that? What was I trying to prove?
---
Our main character has a nasty habit of falling into deep slumbers and waking up where he doesn't know where he is. In fact, the first place he wakes up...
... is in Hell.
---
Through some horrifying circumstances, the blue armor that was scattered in the ruins of the Royal Sisters' Castle reconstitutes the vessel of Nightmare Moon. Only this time, a human soul is its life source.
---
Rated Teen for some questionably older implications toward the beginning. In contrast, pyromaniacs will find said implications very underwhelming.
(Warning! Transgender imminent!)
Edit: This story was written solely for entertainment purposes. Please do not dive into this expecting a well-tested chemistry report.

Edit: I think I found a cover that just might work for now.

There are 100 billion stars in the Milky Way, and humanity is determined to explore every one. We send probes, probes with the blueprints to reproduce human explorers upon arrival. Uninhabited worlds the galaxy over can be colonized and populated, until after many years they too can join the vast throng of interstellar civilization. But if a probe is very, very lucky, it will land on a populated world instead. Equestria is one such world.

Even so, it's far from perfect for colonization, not with an environment lethal to human life. But each probe is resourceful and armed with the greatest machine intelligence mankind has devised. If placing a human mind into a newly manufactured human body won't work, it will just have to get a little more creative.

This book has a Hardcover! If you want to pick it up, you can grab it here: https://starscribe.net/

This story was written at the behest of Canary In The Coal Mine, who is sponsoring it on my Patreon. As usual, cover by Zutcha. Editing by Two Bit and Sparktail.

Fantastic prereading help from: Chyre, Danger Noodle, Doctor Disco, and Doggyshakespeare (who also did the Esperanto translation). Thank you all for helping to make this story more readable and more consistent for everyone.

“As Gregor Samsa awoke one morning from uneasy dreams he found himself transformed in his bed into a gigantic insect.”
― Franz Kafka, The Metamorphosis

Here I was, hiking the Appalachian Trail with my service dog, when everyone vanished in the night. Not only that, I've transformed into some bug monster. That...isn't going to help my mental problems very much. Now I got to find a way open up my prescription bottles with hooves. Will I even get more medicine? Is there anyone still around? What about my Grandmother? And I'm pretty sure I can hear stuff screaming and growling in the woods.

Getting home is going to be tough.

Part of the Ponies after People Universe. Rated Dark as this story will be visiting darker topics such as mental illness, death, and other unpleasant things. Illustrations and Cover, by me!

Edited and Pre-read by the wonderful Stahl and Courage. Awesome.

Superior ePub version by Phoen1x [9/28/15]

SoundTrack - Listen on 8TRACKS!

This is my first story I've written for the MLP fandom. Please feel free to offer up any critique or advice. They would be very much appreciated.

Featured on 9/9/2015! Yays :D

Using some changeling magic, and the fine art of method acting, Chrysalis will take control of Equestria in the most fiendish way possible. Can anypony possibly stand against her (without picking her up and giving her their soul)?

Art used (with permission) from Starstruckmana. (Source.)

Now with a Spanish translation by ZodiacalComet.

See This Blog for licensing.

Captain Flowers thought it would be just another ordinary day. Be there for his men, keep the fighting to a minimum, and make sure nothing bad whatsoever happened to Church. Just like any other day in Bloodgulch.
And then the little pony appeared and refused to let go of his charge. This was going to be interesting...

---
Part of the PWNY-verse.

Another side of the story is being written by cyberlord4444, and can be found here: https://www.fimfiction.net/story/386172/rock-in-the-gulch-analysis-anarchy

Edit: New Cover Art by ProfessorCatPro
Edit 2: Fan art by Cookie_Girl! So adorable!

In the aftermath of "A Royal Problem", Celestia wants nothing more than a good night's sleep. However, her subconscious has other plans, as a mistake from the previous night returns to haunt her dreams. Now, Celestia must confront her darker self once again — and learn just how little she truly knows about the dream realm.

Rated for a couple brief mentions of death or physical injury.

Twilight isn't having a very good day. An experimental spell blew up in her face, an army of changelings is attacking Canterlot, and she just died. Yet somehow, it looks like it's going to keep going downhill from here.

Given the chance to correct what's gone wrong, Twilight swears she's going to fix all this even if it kills her. Which it will. Frequently.

Cover art by Pixel Prism
Spanish Translation
Series TV Tropes page

Starlight has a conversation with Pharynx about the significance of a changeling’s true form. In the process, she might just learn a thing or two about herself as well.

Cover art by InkSpecter, formerly AzureDreamerRode, who graciously gave me permission to colour it.

This story is a sequel to A Stitch in Time

Having discovered the message left for her by Star Swirl the Bearded in the distant past, Twilight once again finds herself caught up in the middle of a struggle against forces far greater than herself. In order to even stand a chance she'll need to travel further and wider than she ever has, and forge some unlikely alliances with old enemies. All to bring down the powers that have manipulated and shaped her entire life, and retake control of her own future.

The conclusion of the Time Loop Trilogy, which began with Hard Reset
Available in Spanish thanks to dgs1993
Series TV Tropes page