Daring Do cannot believe her luck when she is asked to help explore the most ancient tomb known to ponykind. But terrible danger awaits her, for beneath the earth rests something beyond equine understanding.

Warning: comments contain ending spoilers.

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When the ponies came, they tried to convert humanity with words and kindness, saying that they were misguided beings and the princesses would help them on the path to Harmony. When that failed, the ponies tried the potion, only for it's magic to be countered by humanity's science. Then they tried force and failed completely at that.
Finally they decided to let the Barrier defeat humanity and it seemed to work! Nearly 50% of the planet was covered with humanity doing it's best to find a solution.
Unfortunately, the ponies of Equestria are about to learn a harsh lesson that humanity learnt long ago. The Earth can be paradise for those who tame it, but to others it is hell.

For the last 26 years, humanity has been fighting a losing battle with an alien collective known as the Covenant. Fleeing a battle, one UNSC ship stumbles upon the planet Equis and makes a discovery that may just change the outcome for the better. As the Covenant closes in on victory, humans and Equestrians must form a tentative alliance in order to survive the onslaught of aliens bent on their total destruction.

NOTE: Equestria is anthropomorphic in this story

Equestria, the stellar empire long joined together with the Covenant has commissioned an inquisition into the crusade against Humanity, such a monumental task falls into the hooves of the diligent Twilight Sparkle. Granted the title of Inquisitor can the Unicorn bring herself to admit the terrible truth should she find it?
but more pressingly can she survive the deadly battle of Installation 04?

After a smash and grab mission goes haywire, the Master Chief finds himself in Equestria. As he meets the ponies we all know and love, his past with Cortana haunts him as he struggles with his new life.

But a threat who wants revenge makes their move . Will John 117 move on from the past to face the enemy, or will he not care and doom the ponies to their fate?

In the pony timeline, this takes place after Tirek is defeated. In the Halo timeline, it takes place after Halo 4 and before the events of Halo 5.

Edit 1: Changed the rating from mature to teen. Tell me if I should keep it the same.

It is the year 2552 and the Pillar Of Autumn has just entered Slip space to escape the Covenant fleet at Reach. A malfunction occurs with the Slip space drive and sends the Autumn and her crew into unknown space. The first planet that comes into range is very Earth like, and is giving off intelligent life signatures. What they don't know is that their only way back home is on this planet. The Autumn dispatches a scout party and what they report back is unbelievable. A world completely inhabited by ponies, millions of them..... Welcome to Halo: Equestria.

I'll add in more character tags as they are introduced in the story.

Cover image is: My Little Mjolnirs: Friendship is Mark VI
by *COBilly
Fan Art / Digital Art / Drawings / Games ©2012 *COBilly

Halo is the property of Bungie and Microsoft.

My Little Pony: Friendship Is Magic, is property of Hasbro and Lauren Faust

I do not own the cover image, Halo, or My Little Pony: Friendship Is Magic.

The year is 2557 AD. Four years, seven months and ten days have passed since the activation of Installation 04B and the annihilation of the Flood. While humanity and the Covenant have struck a truce for the time being, and started to rebuild their civilizations, Master Chief Petty Officer Spartan John-117 has been in cryo-sleep, adrift, while his ancillary AI, Cortana, has been trapped in her own thoughts. She had been looking for a reason -- any reason -- to wake the SPARTAN up. Now she had one.

They were crashing.

{Description Edited 4/25/2014: Clarified Installation 04B}
{Edit 05/02/2014: Trimmed character list pending future change}

There is a legend. A legend of six heroes destined to protect Equestria from danger. But these six are not the Elements of Harmony. They are more.

The Steadfast Commander.
The True Genius.
The Vigilant Eye.
The Merciless Wrath.
The Fighting Spirit.
The Lone Wolf.

They are the true Protectors of Equestria.
They are the Guardians.
They are Noble.

Alright, so here is the story I have teased on my blog, The Noble Guardians! If you already guessed the concept, good for you! But for the rest of you, this is a Halo: Reach Crossover. I have seen a couple fics in which Six or Jorge are brought to Equestria, but they were always alone, so I decided to bring them all together as one. This will follow the show's storyline, with Noble acting as additional characters to the episodes, but don't worry, I guarantee they will be major characters with their own arcs and there will be plenty of original situations. I will also most likely skip any episodes in which Noble would have little to no involvement. (This will be few and far between, one example being "Call of the Cutie" I mean, even the Mane Six are only minor characters in that episode. I'll probably either mention those in passing or have another story going on with those episodes occurring in the background.) Anyway, see how Noble reacts to becoming Equestria's destined protectors!
Cover image credit goes to Gekko3309.
Naturally, this story contains spoilers for Halo: Reach

...My name is Alex Mercer. I'm the reason for all of this. They call me a killer, a monster, a terrorist... I'm all of these things. Three weeks ago someone released a lethal virus in Penn Station. I woke up at the morgue. Now I hunt, I kill, I consume, I become. I'm gonna find out who did this to me... And I'm gonna make them pay.

Jorge and Noble Six are among the few humans to ever destroy a CSO-class Covenant supercarrier. This occurred during Operation: UPPER CUT but at a heavy cost. Along with the destruction of the "Long Night of Solace" came Jorge's death.

Or so it seems...

*First Fanfiction Warning*