When shadows descend on Equestria, the Mane Cast joins a moody pony named Riku in fleeing their home to fight the source of the Darkness. They quickly find hints of a dark conspiracy to destroy everything good about the world, but at the same time, discover the depths of their own strength.

Kingdom Hearts Crossover.

Mysterious chunks of a majestic civilization suddenly begin landing everywhere in Equestria, in every town... save for Ponyville, who gets quite the surprise. A lonely soldier named Rogue appears, searching for "Mu". Tales of his extremely violent behavior quickly spread through Equestria, and nopony can stop him, not even Celestia.

And then a savior arrives as a blue shooting star, streaking across the night sky. Calling himself Mega Man, he seeks to bring Rogue back to his world, and possibly take Mu with him. He is armed with very powerful technology, things ponies have never seen before... and some strange beings, who call themselves Wizards, that can fuse with other beings, like ponies.

A long battle between friendship and loneliness will soon come to an end. The only problem is, both of them are packing reinforcements...

Author's Notes
This story takes place in quite a few perspectives. It's Geo's if "winged horses" or "Air Display" or some non MLP-ish vocabulary is used, whereas if "Pegasi" or "blue floating panel" is used, it's a pony's. I figure it's important to tell you, the reader, because you may be confused at my inconsistent choice of words.

Stephen has a nice chat with the Princess

Stupid title aside, haven't you always wondered what a story about ponies, Magic the Gathering, and a horribly cheesy Yu-gi-oh!-esque plot would be like? No? Well shut up, I made it anyway! Watch as ponies play card games, albeit not on motorcycles, and have to defeat a dark and mysterious EVIL that also plays card games because... Um... Well, who doesn't like card games?
Inspired by that picture thing accompanying the story, this fic is a fun thing I've been wanting to do for a while. As a fan of Magic, I've been wanting to someone create a crossover like this for a while. It didn't happen. So what's a brony to do? Write it himself, of course. Not sure if I really succeeded, so any constructive criticism would be awesome.

If you don't actually know how to play Magic, you're going to have a tough time following what's going on (Game-wise, that is. You'll be fine with the plot.). Twilight explains quickly about some of the game's rules throughout the first chapter, so those of you who've never played before may kind of get what's going on.
And for those of you who couldn't give a crap about the story and just want to see what cards the characters are using, the recipes for the decks used in the chapter are at the bottom.

It is the year 3070, and Mankind is once again at war. The battlefields of the future are dominated by fierce, robotic war machines known as BattleMechs, and under their auspice empires have risen and fell. Now with the worlds of the Inner Sphere once again facing the drums of war, two mercenary units have set off on their respective missions, their only tie a common ride upon the back of a JumpShip.

Yet when a cosmic accident causes a misjump, they find themselves thrown into a world that they cannot fathom: a world where magic is a force of nature, where mythical creatures live and thrive, and colorful ponies live protected under the aegis of their monarchs. New choices lie ahead, decisions must be made, and the inner character of Humankind will be put to the test when the question is asked: to conquer, or protect?

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It is the year 1023 after the ascension of Celestia and Luna to the dual thrones of Equestria, and Ponykind is at peace. With Luna cleansed and Discord sealed away even more thoroughly than before, all looks bright for the future of the colorful equines. With friendship and optimism, they face each day with hope and vigor.

Yet, when the heavens scream as a foreign object tears its way into their reality, the princesses and their subjects face a new threat that they cannot fathom: creatures and machines from a world of death and darkness, where magic is unheard of and the avarice of powerful men drive the engines of war to crush the innocent under their bootheels. Can they survive the coming of these coarse beings, and can they maintain the magic of friendship in the face of Man's Inhumanity?

With Russian Translation provided by Undermind.

A crossover with the Battletech universe, though this is an alternate BT timeline of my own devising. [WARNING: Fandom related material and fanboy rant to follow. Non-Battletech fans won't care, read at your own risk.]

Because **** the Word of Blake and their munch-tastic "armies from thin air" BS. Yes, I know the Clans were almost as bad, but at least they had some sort of justification in-universe. Wobbies? No. Just no. I don't care that it was 15 years, you don't go from "fringe group of mutually-antagonistic and argumentative sub-groups following various degrees of religious mania" to "WE ARE THE SPACE NAZIS ALL WILL BOW BEFORE US" like that.

So for BT fans, this is a 'verse where the Second Star League is still around, the Wobbies still had their temper tantrum though it was smaller and more in line with a bunch of religious fanatics. No stupid "knock everything down for ClickyTech" Wizkids/Fanpro approach, nor any "hey let's shove a bunch of cheesy Level 3 stuff at the players to make the game even more complicated" Catalyst Games stuff. This is just good ol' fashioned 'Mechs wailing on each other, only with ponies. Who will also be wailing on 'Mechs. GLORIOUS.

Cover image by Icaron of DeviantArt.

First story I have written in a long time. Celestia has been studying warp travel and extraequestrial life. She commissions the mane six for command of her starship, the E.S.S. Everfree. They get into all sorts of trouble, meet new species, and boldly go where no pony has gone before. Warning, it may get a little dark at somepoints.

Luna is no longer Nightmare Moon, and has returned to rule Equestira once again, but not everypony is so ready to forgive. When a secret organization kidnaps the Elements of Harmony and threatens to murder Luna, Rainbow Dash must go back into the memories of her ancestor Firefly, to learn the ways of the Assassins to fight this new terror and save the new princess, as well as her friends.

Credit to he4rtofcourage for the title image.

Samus Aran is on the run. The Federation has branded her a traitor. Now with only her gunship and recently aquired abilities she must escape. Her escape lead her to crash land in Equestria. Unknowingly she will distrupt all life of everypony there.
Image by http://cheezburger.com/builder#Memes

Princess Luna, ruler of the night, has spent a thousand years watching the increasingly-corrupt Equestrian nobility hatch their schemes. Sick of their plotting, she secretly gathers a group of ponies to deal with them once and for all.

Twilight Sparkle wakes up on the streets of Manehatten with no idea how she got there. Things take a turn for the strange when a scroll appears in front of her, threatening erasure and signed by "The Reapers". Just what is this game that Twilight has gotten herself into, and can she survive for seven days?