(CJ)Cave Johnson here, (TW)Twilight Sparkle here, (CJ)and we will be testing the least safe parts of science possible! First, we're going to see if we can turn Scootaloo into a chicken! (TW)For science! (CJ)Yes yes, for science! Then we will see if Applejack can survive if we replace her apple trees with combustible lemon trees! And last but not least, you all might have wondered, what happens when you give Pinkie Pie coffee? Well, we're about to find out! (TW)For science! And many more! The possibilities are endless!

An undead Emperor in need of a new body. A Spartan lost in space. A ragtag team on a suicide mission. What do they all have in common? They all wind up on the magical world of Equestria, where war has been forgotten. That, however, is soon about to change.
When each of them is about to be retrieved, ancient evils arise to unleash hell upon the unsuspecting world. When the forces of three galaxies clash around them, can our favorite ponies hold out against the onslaught?
This is a crossover involving Warhammer 40k, Halo, Mass Effect and MLP, and is also my first fanfic. Comments and reviews are welcome.
Rated T for language, violence, and general adult situations.
Now on Tv Tropes!

The year is 2154, Humanity is on the cusp of interstellar travel, with the earth united under a single banner. Then an anomaly is detected, 0.75 light years from the sun a Wormhole has formed, large enough to swallow a planet and stable enough to stay open for years at a time, in a rush of scientific progress a vessel is built and crewed with the cream of humanity, the best astronauts from around the solar system.
Then it sets out across the stars, a physics defying engine driving the ship towards this gateway to places and times unknown.

A universe away, a purple coated unicorn trains her telescopes to the night sky, and notices a strange object in the sky. A hole in the endless dark between stars, through which another dimension can be seen.

When Luna and Twilight discover the Forward Unto Dawn, they wonder what this could possibly bring to the peaceful land of Equestria. They have no idea what could possibly be on this odd object racing to the ground.
When Cortana awakens Master Chief from his slumber, she warns that the Dawn is falling to the surface of an unknown planet. Chief must find a way to get to the ground safely and survive in this new, oddly colored place.

This the beginning of my first fanfiction. It will be a continuing story until I decide to stop. I hope everyone will be supportive and encouraging as I write this story for all you guys.

Years drifting in space aboard a frigates wreck with nothing to do but wait and think can really wear an AI thin, and when that AI is already past its expected rampancy date, all that thinking time is dangerous. Very dangerous. Fortunately for Cortana, the frigate is pulled into an unknown planets atmosphere, allowing her to take her mind off of rampancy for a while. After being rudely awoken from cryo sleep, the Master Chief, along with Cortana, manages to escape the burning vessel. They have very serious problems though...

They have no idea where they are, or how they'll get back to Earth.

They can only hope someone finds their distress beacon, and fast. The Chief doesn't have many supplies, and with a rapidly decaying AI in his head, he has a lot on his hands. Luckily for them, the planet is life supporting. Unfortunately though, the inhabitants of the strange planet aren't the most welcoming of a seven foot tall alien, especially when that alien is as aggressive and lethal as Spartan-117. The Chief has only one objective, find a way off of the planet. The inhabitants will soon learn, however, that the Spartan is extremely aggressive, and will stray slightly from his objective to harm them if he must. Chief also learns that these beings are no pushovers, and will defend their home and kingdom with their lives.

The first few chapters are mostly to establish a plot, there will be much more action after them. This is also my first fic, so constructive criticism is appreciated. I will be reading the comments quite thoroughly for the first while, so you may see some of your ideas in future chapters. I am only 15 years old, so basically, I have school, homework, and sports that will quite often get in the way of this story, but I will work on it as much as I can when I can. I won't give up or quit in the middle of the story despite what the ratings may be, and last but not least, I won't be turning this into some huge cliche war where Equestria ends up fighting the UNSC and whatnot. Because Equestria would get screwed. Badly. Then the story would be ruined, so, I hope anyone who reads this enjoys!

I do not own the Halo franchise, My Little Pony: Friendship is Magic, or Forward Unto Dawn.

Story added on October 25th. Edited by myself, and inspired by Halo: Ponies and Clouded Pasts by Blazer and The Mercy, Regret, and Truth by Master 4871.

PS: This made it into the featured box the second day it was uploaded, and remained there for a couple weeks. I'm pretty damn proud of that since this was my first fanfic ever, and the first thing I ever posted anywhere. The only other people to read my creative writing creations were my English teachers and occasionally my grandparents and father. So seeing the first thing I submit get such great feedback and a huge amount of views (huge to me), is just amazing to me.

Thanks, bros.

They came to Earth in peace, all but looking for salvation. The world greeted them with open arms. The... Ponies... Were all nice and cheerful. Until... They wanted to take over the world, saying it is unfit for humanity. They attacked. They killed. They... Made humans into ponies. Humans fought back, but crumbled soon after. Except one. He fought with Queen Solar and Heaven King; Celestia and Luna's Mother and Father. He lost and was sealed in ice for two thousand years. Now he's back, and his trigger-finger is itchy for war.

BETA: Chaotic Pony

Cover Image: HeimoBauss

After living in a state of depression you realize the only source of happiness is in the show My Little Pony. But sadly, cartoons don't love back. It is a term you have grown to hate. But after a freak accident in Equestria, will your life turn out for the better? All you need is a bundle of joy - or six - to show you the right path.

NOTE: Two things. One, the beautiful cover art was made by Bitter-Knitter. Link to his/her deviantart page: http://bitter-knitter.deviantart.com/
And also, this is my first fanfic, so be wary of that. I will continue my writing only if supported to do so.

EDIT: Ho-ly shi-t. Did not expect in a million years to have this much support ;) THANK YOU!!

Support and Assault are lost. None of them knows where they are. But no time for that because they are to busy not trying to kill each other. How will this new land effect their "friendship". How will a bunch of ponies effect them as well.

Battlefield 3 /MLP FIM crossover

The Shadow...
A dark entity that has been plagueing the quiet town of Ponyville for several days now...
...is really freaking annoying the manure out of everypony there, especially Rainbow Dash. But as the mane 6 try to get together to catch this trolling creature, what mysteries will they inevitably uncover?

Will they find the origins of the creature?
Will they figure out why it retreats to the Everfree Forest when it's done trolling ponies?
And will they be able to outsmart it?
Maybe... maybe...
...
...but I have yet to meet a mare that can outsmart the Bonk!

(Pssst, the shadow is the Scout. TF2 crossover peeps!)

A TF2 crossover? Seriously, how many of these have shown up? Oh well, time for my effort.

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Equestria and Aquileon, the griffon's realm, have a long-standing agreement: Every five years, teams from each country will face each other in a competition to garner fame and glory for their home and for themselves. This year, the griffons have chosen war games, confident that they can steamroll the peace-loving Equestrians.
Princess Luna, determined to stop this from happening, pulls nine great warriors from their world to help Equestria and to train their representatives. But was this a good idea?

This is kinda... experimental. If this garners enough interest, then I shall continue it. Otherwise, I shall let it die quietly.
Also, if somepony can give me the source of the picture I'm using, I'd appreciate that immensely.