Thomas Miller proudly wore the armor of the feared Firemen of Columbia. Battle hardened and devoutly loyal; nothing could prevent one of Comstock's most elite soldiers from completing his mission. Even if that mission was to apprehend the Prophet's daughter, Elizabeth. He had a goal that no force on heaven or earth could stop him from achieving.....except perhaps Elizabeth herself.....

What happens when a pyromaniac finds himself dropped in the middle of Equestria?

Bioshock: Infinite/MLP crossover.

A week after moving to Ponyville, Violet Petal as already seen and experienced wonderful things such as the Elements stopping evil villains and monsters, the Castle of Friendship, and Pinkie Pie's parties. Unfortunately, she has also experienced many awful things. Including prejudices from the town's residents. For she is a Thestral, or "bat pony," to the more blunt members of society.

After one particularly bad day, she runs across a strange bipedal creature napping in the park.

Author's note: I was featured! It was for a few minutes, sure, but still!

On a dark night filled with even darker magics, an insane cult attempts to give Nightmare Moon a body and life of her own, utterly separate from Princess Luna. But, when the spell is interrupted by Celestia, something unexpected is created.

Now, a little black alicorn filly named Nyx finds herself living under the care of Twilight Sparkle, only to be haunted by memories and emotions from her past. Is she Nightmare Moon reborn or is she simply a doppelganger with a soul and mind of her own? Can Twilight Sparkle protect Nyx from those who refuse to see past her dragon eyes and black coat?

Or, will Nyx be forced to inherit the sins that may not even be hers and become the greatest evil Equestria has ever known?

An accident in the lab sends our favorite boy genius to Equestria, as a pony. What will he do and how will he get back? The answer: Science! (Cover Art Updated!)
New FAQ! and TV Tropes!
Planned Phrases from Dexter:
“Pinkie Pie! Don’t push that Button!” /to Pinkie
“Please, Magic is the word simpletons and the ignorant use to describe what they cannot understand.”/ to Twilight
“No, I didn't strap a rocket to you. I strapped you to a rocket.” /to Rainbow Dash
“Friends? Who needs friends?”

Dexter is a boy super-genius with a disdain for anything girlish and no desire for friendship. After an mishap in his lab, he gets stuck in Equestria. How will he cope with the over-friendly ponies, and the girlish everything?
For any who do not know Dexter's Lab: http://en.wikipedia.org/wiki/Dexter's_Laboratory
[RIP Christine Cavanaugh: 8/16/63-12/22/2014] - Dexter's Original Voice Actress

Celestia approaches Twilight about her research, and asks her a question.

Why.

Reading by Zealous Harmony

Everyone knows that making friends is hard. Keeping them long enough to defeat several evil villains bent on world domination, and a few ponies who are just jerks, with nothing but the sheer power of friendship and good feelings is even harder.

Wouldn't everything be easier if you just had a gun?

Let's find out.

Coverart and the concept as a whole is from that guy named tjpones, go look at his stuff.

The ponies of Ponyville grew fearful of a being that lived among them. Wielding the weapons of his people, will they finally band together and claim victory over him once and for all? Or be shot down in defeat?

Fifty years ago today, there was not a war. It was not one of the longest and bloodiest struggles ever known to ponykind. It did not claim the lives of hundreds upon thousands of ponies.

There is no such place as Shetland. It could not have been Ground Zero for Operation Petrichor because it never existed.

The Cloudsdale Massacre is a cheap horror flick, nothing more. Chemistry has no solid application in combat. The Non Sunt Dii has not existed since the first days of the Royal Sisters' reign.

Celestia is perfect. Celestia has never made mistakes. Celestia is not a coward.

Rainbow Dash was the Iron Wing. She was a war hero, the Slayer of Shadows, the Liberator of the Crystal Empire, the Wrath of Celestia. And depending on who you ask, she still is.

But the war is over. There's little need for a pony like her in peacetime. So she keeps telling herself that she needs to adjust, that she needs to find a new role to fill in the world that she saved. But Equestria seems content to let her remain what she has become, even though they have no need of a warrior.

"This isn't how it's supposed to be", is something she keeps telling herself. But every time she says it, the only thing she can reply is, "so what should it be?"

One whole year after the close of the war, and Rainbow Dash still doesn't have the answer.

Art by NCMares.

Can a utopian paradise that preaches love and tolerance really make ponies happy? Does contentment really lie in free universal healthcare and open government?

Twilight Sparkle is determined to resist this happy world on a matter of principle, and finds herself sneaking off with a mare called Trixie to hate and loathe each other in secret.

Will their hate-nest go undetected? Or will they be forced to face the dangers of the Ministry of Love and the mysterious Room 101?