(This is a Crossover with Halo. If that genre offends you, you need not read any further.)

Cortana has several problems, and very little she can do to solve any of them. Being stranded on half of a ship in deep space, with the clock on her lifespan slowly running out, she gets desperate enough to try almost anything.

She goes so far as to land her half-ship on a strange astronomical anomaly, in the slim hope of finding a method of FTL travel on it. Now, her latest problem consists of understanding the mind-bending physics of this planetary crime against reason, without prematurely going insane.

Chief wakes up on a new planet, and is, as always, presented with aliens he needs to kill in order to accomplish his mission.

Equestria witnesses the arrival of a large object from space, and has to deal with the fallout of it's destructive crash landing. Though the real threat the object poses is not something anypony could have anticipated.

(Knowledge of the Halo games is advised, though not strictly required.)

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Rated Teen for gore... rating may be subject to change, we'll see.
I am currently looking for an editor, pre-reader, and/or proofreader, preferably someone who can double check me on the lore when it comes up. Shoot me a PM if interested. I've got a few people who have generously offered their help. Thanks for offering to help make this as good as it can be!
Will update tags as story progresses.
Fair-warning, this story is secondary to my other one and will update less frequently.

A creature of old has been present in Equestria since the beginning of the rule of the alicorns, watching, waiting. He saw their fall and the sisters' rise to power. Now, for the first time in eons, he steps from watching and takes action.

As the personal protegee of Princess Twilight Sparkle, Luna's life is more than crazy enough for a unicorn of her age. Balancing her studies and putting up with her hard-partying pegasus sister is enough to keep Luna up most nights with little or no social life to speak of. But as the only one who believes the legends that Tirek the Terrible is returning and the only one who actually cares enough to stop him, it doesn't look like Luna is going to be getting any sleep anytime soon.

Which is just as well, because she keeps having the strangest dreams about a life she half-remembers; a life of long nights spent as Princess of the Moon and a terrible catastrophe that befell her kingdom. But those are just dreams...right?

With the fate of Equestria resting on her shoulders, Luna must unite a group of unlikely allies to stop Tirek, save the world, and solve the riddle of her nightmares before they come to life.

On one of her regular hunts for gemstones, Rarity discovers a treasure trove beyond her wildest dreams... and the lavender-scaled dragon who collected it. Despite a rocky first meeting, Rarity and Greenfire soon find themselves drawn to each other more and more. But the question remains: How did a young dragon end up in the Everfree Forest all alone?

An alternate universe story that puts our favorite purple dragon and his beloved fashionista into a slightly different situation. Art used with permission from the wonderful ArtisteFish!

Now with a TV Tropes page! Thanks go out to Poptard and whoever else might feel like editing it.

Fan Works
Climbing the Cliff by Pia-chan (from chapter 5)
Such a Pleasant Chat by Fukaï
Some Form of Tea by Pia-chan (from chapter 4)
Promo Animation by CMagic (mild chapter 6 spoilers)

Hard lives breed hard ponies, whether by choice or by need. A chance meeting, a kindness rebuffed, and a direction of travel shared all lead to a journey of self-discovery on two fronts.

Cover is a composite of images from the talented artists Murphylaw4me and Dufy.

Hey there. Name's Discord. I'm the janitor at a high school. I clean up after bratty teenagers and the odd drama queen or two that turns into a demon and wrecks up the school. Ain't my job grand?

Birthday gift to my bro Skeeter The Lurker, a really rad dude everyone should check out!

Awesome art from the greatly talented ManiacPaint, who you should definitely check out for more good art!

After successfully completing another mercenary mission, Deadpool feels that he is living an unfulfilled life. As he flips through his television, he discovers a show called My Little Pony: Friendship is Magic. Deadpool becomes instantly obsessed, and not long after, he starts comparing and contrasting the world he lives in today to the world of Equestria. He suddenly concludes to himself that Equestria would be a better place to live in...

Tired of Luna's constant nagging, Celestia agrees to give internet dating a try. Using the website www.notforeveralone.com, Luna helps Celestia go on dates with potential immortal suitors. Shouldn't be too hard to find true love, right?

You can make a suggestion for any immortal across any manner of genre or fiction for Celestia to date next. Just make sure they're immortal for it to work.

Updates every Tuesday and Friday.

Guest chapters for immortals I have not covered are welcome, since I won't be able to write about every suggestion someone has. Note that all guest chapters are non-canon from the main story, so there is a bit of leeway to them. Talk to me over PM's for any further discussion.

Thanks to my editors The Ponytrician and Garnot for all their help!

Cover art from the hilarious tumblr you all should check out, ~Letters For Celestia~

A strange pony tries to steal Twilight's crown! But when Twilight finds out that said pony has only good intentions, she agrees to travel to her world and make things right, in the ultimate MLP/video game crossover that everypony has been waiting for!

"... This is too ridiculous NOT to read! (And you can quote me on that, if you wish.)" -Magical Trevor, Fimfic User and Magically-Inclined Trevor

(When told the title of the story) "I'm going to need you to kill yourself." -Menelven, Nice British Fellow

"A king's time as ruler rises and falls like the sun. One day, [Twinkletail], the sun will set on my time here, and will rise with you as the new king." -Mufasa, One-Time King of Lions (Paraphrased)

It's that day. The one day of the year that Celestia dreads more than anything in the world. And too bad for her, everyone seems intent on making her go through such an awful occasion. Well, at least she gets cake at the end of it.

Thanks to my editors Skeeter The Lurker, Xl9 and The Abyss for all their help!

Art from the very talented http://yubi-note.tumblr.com. Go check them out!