After a mishap in a magic duel, the ponies are transported to the Team Fortress universe. They'll take the classes places while The Engineer tries to find a way to get them home.

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

The reign of Morgoth in Arda is over. He has been defeated by the Host of Valinor and the Valar have bound him once more in the chain Angainor and cast him through Doors of Night into the Void. There he has drifted for many long ages, pondering his deeds and his defeats until Ilúvatar comes and offers him a chance at redemption. Softened by ages in the endless Void, Morgoth accepts this chance at freedom. He is given a new body and sent to a new world with the task of learning the values he has shunned for so long. In this new world, under the watchful eyes of Equestria's Valar, the Dark Lord will come to realize that there are yet things greater than the power of darkness.

Also yes, I understand that there's no "e" in Silmarillion, it's a pony pun. Sil-mare-illion. Geddit? GEDDIT?

Ponyville faced an ordinary day, but then night came, and with it a massive gateway into another world. It closes before any action can be taken, but now the Mane Six and Canterlot nobility are tasked with finding out what they can about the gateway. Who created it? Where did it lead to?

And most importantly, did anything come through?

Takes place after Season 2
Now 20% cooler with a TVTropes page!

Metal Gear has fallen into the hooves of an Equestrian revolutionary, who, with the backing of his human mercenary allies, intends to use it to depose Celestia and crown himself ruler. Having crossed into Equestria in pursuit of this rogue weapon, the legendary Solid Snake must ally with the residents of Ponyville to prevent a nuclear catastrophe.

See also Equestria Gear Solid, the hilarious spin-off EQG parody in which everything you know is wrong, and every single character from the story is an awful caricature of themselves.

Now with its own TVtropes page!

More popular than the "Celestia's Homecare" omnibus, better selling than "Fifty-Three More Things to do When Trapped on the Moon", and more controversial than the infamous "Cupcakes", how does the story of this remarkable book differ in a universe full of... pony?

After escaping the destruction of Equestria at the hands of some big ol' meanies, Pinkie Pie leads her friends on a series of baffling, mind boggling and downright nonsensical adventures through a galaxy where harmony is in short supply, but aliens, monsters and chaos are most definitely not.

Gasp! As they meet strange alien creatures!
Cry! As emotional torment assails our characters!
Groan! As the Author includes yet another 4th wall break!

And most importantly, DON'T PANIC

Pinkie Pie is visited by a strange customer whilst working at Sugarcube Corner. Hilarity ensues.

When Ruby boards the first trans-oceanic flight in Equestrian history, the last place she expects to end up is stranded in the middle of Eternity's Crossing in the wake of a horrific zeppelin crash. After a mysterious tower leads her and a fellow survivor to discover a twisted and fragmented city twenty thousand feet below the surface of the ocean, though, a bit of fire and smoke is the last thing she needs to worry about. Between the horrendously disfigured residents and the paranoia of the madmare who once built and controlled it, daily survival in this corrupted utopia is anything but a guarantee. But with the help of some new friends and a few genetic enhancements, Ruby isn't going down without a fight, and in the process might just discover that the deadliest weapon in Harmony is herself.

An adaptation of BioShock for the world of MLP. Written to be comprehensible to anyone, regardless of whether they've played the original game.

In yet another attempt to gain their cutie marks, the CMC challenge Diamond Tiara and Silver Spoon to a duel.

(If you don't like Yugioh do yourself a favor and walk away)

Yugi has grown tired of Kaiba's attitude towards him and his friends. It is time to show him the true meaning and power of friendship, and what better way to do that than by beating him in a duel using cards that are pretty much fuelled by friendship.

Some of you will have read my OTHER Yu-Gi-Oh! fanfic and this is a formal apology. It was an attrocity that I never should have even started. I felt I owed you a proper fanfic to show that I can actually have original ideas so here it is. I hope you enjoy it more than the last one.