Part 1: Lyra's Pyro Predicament
Part 2: Twilight's Demoman Devastation
Part 3: King Sombra's Robotic Retaliation

King Sombra was soundly defeated by Princess Cadance and Shining Armor almost a year ago, and the Crystal Empire was free. Now, after a teleportation mishap, a lone Engineer from Gray Mann's massive robotic army has found itself in the mountains just on the border of the Empire with one task in mind: complete the experimental Lvl. 4 Teleporter and bring the robotic forces to Equestria...but what other dark forces might be laying dormant in those caves?

Twilight has developed a device that can detect strange signals coming from outer space; signals from aliens! She gathers her friends so that they can all listen in.

But they may not like what they hear...

cover image courtesy of DocWario

I'd appreciate if everyone could keep the YouTube embeds in the comments to a minimum. The sheer number of them is putting a bit more strain on my connection than I'd like. I'm going to start deleting any comments with 2 or more embeds in them.

And there came a day unlike any other-
When champions found themselves in Equestria united against a common threat.
On that day, they became heroes.
The invincible viking, Dovahkiin.
"What's a viking?" asked the dragonborn, turning to look at the the other champions.
Soma Cruz, Prince of Darkness.
"Hey, no- Just his incarnation/split soul/potential something or other," said Soma, arms thrown out to the side in a shrug. Even he was not sure what to call his situation.
The Dan, angriest hero there is.
"I have a last name you know- And who is talking anyway?" Dan had each of hands resting over both hips to look around.
Nathan Drake, fortune hunter and historian extraordinaire.
"I still don't know who Daring Do is supposed to be," Nate questioned with a raised eyebrow.
And Phoenix Wright, the first Avenger.
"That's copyright infringement! But we do need a team name..." Phoenix rubbed his chin in thought.
Humans, Assemble!
"You are not helping Pinkie Pie!"

(Interlude II is a mini guide if you want info and pics on the humans appearing in this story... So far.)
(Hey, don't be afraid to leave comments.)

Twilight Sparkle finds herself inside a cocoon in the throne room of Canterlot Palace along with her friends and many other ponies. She is thrust into a dream world by Chrysalis who is feeding on the feelings of love and friendship she and the others will experience in their alternate realities. In her dream, she finds Princess Celestia, who has been able to cross between dream worlds. Twilight and Celestia must now travel between dreams in order to awaken their friends and stop Chrysalis. However, some dreams are not as happy as they expected, and some secrets held in the subconscious may be better left unawoken.

Additional character tags: OC's, Princess Cadence, Shining Armor, Princess Luna, Nightmare Moon, Trixie, Zecora, Diamond Tiara, Snips, Flitter, Cloudchaser, Roseluck, Big Macintosh

Inspired by the fan video of an alternative ending of season 2. Click here to watch it!

Featured on Equestria Daily 9/14/2012.

Now a comic illustrated by Zoarvek! http://zoarvek.deviantart.com/gallery/48143295

"Sex" tag added on 10/12/2014 due to sexual themes here and there. It's not the focus of the story, but it's in there. For a more detailed explanation of why the tag was finally added, see the author's note on "Corruption Ch 10"

Old cover art here: http://i.imgur.com/Tgt974q.jpg
Full size: http://i.imgur.com/9uWAX.jpg

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 Pyro.
He is misunderstood. Judged by those who cannot see past the mask.
Sociopath, Pyromaniac, Unstoppable killing machine.
He is feared and hated by all that cross path's with him.

But what would happen if he encountered someone who doesn't hate him?

(Guess what everypony! You can decide what happens in the story! Explanation is in the story.)

After tiring of Twilight's hostile attitude, Discord decides to "help" the Elements of Harmony by bringing in an alternate version of each of them. These duplicates from various worlds aren't told anything about each other, which is good. The last thing Equestria needs is these monsters working together.

***Not too dark!***

Elements of Disharmony
Pinkie Pie from Cupcakes by Sergeant Sprinkles

Rainbow Dash from Rainbow Factory by AuroraDawn

Rarity from The Secret Life of Rarity by BronyWriter

Fluttershy from Pattycakes by Pegacorn Ondacob

Twilight Sparkle from Death Note: Equestria by Nonagon

Applejack from Bad Apples by... Bisque? It's hard to find an evil Applejack story.

The year is 2806, and Humanity has long left the loving embrace of their planet. After defeating the fanatical Enlightened, a warmongering alien race who had come to destroy them, many thought that an era of peace and prosperity was to come.

But that was not the case. Earth was lost in the war, and Humanity was divided.

A galactic civil war is raging in the galaxy, and three notorious pirates seeking to leave that life depart on a voyage to find the long-lost homeworld of Humanity: Earth. But complications arise as their destination is far more colourful, and far more occupied than originally expected…

Follow the tale of the Cerberus Pirates, and their struggles on a foreign world with nothing but the technology on their persons and the wreck of their ship to work with. Striving to get back to Mother Earth, and doing whatever it takes to achieve that goal.

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[Gore tag is more of a warning that things get a bit intense, but not to a sickening degree. Merely a word of caution, as it were.]
[The Team: Dumbgamer99 (Slayer), SovietBacon (Yuri), and Shadow Horizons (Drake)]
[Current Beta-Readers (thanks a tonne, you guys!): Rokkurin, PhiliChez]

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

A meteor strikes Equestria, bringing with it a truth that flies in the face of the Equestrian understanding of Ponykind's distant past, near future and very identity. It holds the answers to where they are from and what their purpose is, but they will soon learn that knowledge never comes cheap.

Special thanks to Kagji5 for editing!