A search for a mysterious energy reading leads a Commander to Equestria and reawakens some of his memories from a place he once called home, but his presence there is not welcomed by some of the nations.
(Note: rating may change later. Also the sex tag is for certain situations)

A Spartan of the UNSC falls into Equestria and has various shenanigans in the land. First chapters revolve around how he meets the royalty, the mane six, and the new world in general.

Forced by circumstance to leave his home, Goldwreath is thrust into a life full of perils and tragedies the like of which he has not asked for -- after all, he'd simply wanted to spare his people from suffering. Now he faces entities of power far beyond anything he can imagine as the war-born and barbaric tribes sweeping the empire. He must gather his wits and put his training to use if he is to save the city of the sacred Seven Hills from the forces seeking its destruction. His enemies are tough, and he will be hard pressed just to stay alive, but no matter how hard the path he will do his duty down to his last breath. This is his mission. This is his duty.

To the far east across the vast sea is the forgotten homeland of the diamond dogs. A land once full of poverty, sickness, and famine has become an industrial super power that threatens Equestrias economic dominance/standing. Can Equestria survive as countless ponies are put out of work from the influx of cheaper and higher quality goods from Britannia or will they be forced into an war against a technologically superior foe? And just who is the Emperor and is every thing they know a lie?

While Twilight and her friends venture to the Crystal Empire, Private is tasked by Voidera to investigate a nearby nation of Snowponies. These ponies have closed their borders for many years, and only recently has the truth been discovered. The land is ruled by a cruel dictator who seeks to "Level the playing field with the races". Private teams up with several of his friends in order to find a way to bring peace to the land. What starts as simple reconnaissance quickly turns into a fight for the very fate of the land. Private and his team must find the lost heir to the throne before the revolution gets out of hoof. But does this heir want to be found? And will peace truly be gained from her victory?

A displaced story about a man who becomes the most powerful being in the universe, at least in MLP terms.
As you may noticed, i have just had a multi-dimensional makeover

Follow Bill in the realm of Equestria in his search for the ultimate goal that all seek in life.
Warning: Contains harsh language and a little bit of gore

Commander Gabriel Reyes has lived a long and tragic life. Once a hero, his rage at being neglected, unappreciated, and then painted as a failure drove him to betray everything and everyone he once held dear - destroying his body and shattering his mind in the process.

Now known as Reaper - an undying wraith haunted by the voices of his past and driven by an insatiable need to kill - he works to further the goals of the Talon criminal organization, and in so doing, exact his revenge on all those that had turned their backs on him. After a string of depressing failures, his latest mission brings him to Shimada Castle to investigate a powerful new energy signature. What he discovers there will change his fate forever...

An Overwatch crossover. At least a basic knowledge of Overwatch lore (heroes, premise, some of the animated shorts) is recommended, but is not required.

Adventure, mayhem, magic of unknown origins. Oh, and talking ponies. These are the strange events that have brought three friends together into the wildest holiday that anyone could imagine.

It starts as a small Halloween chat, where they showcase their costume designs to one another. However, due to events outside of their control, they soon find themselves in a new land during a turbulent time.

Now trapped in a case of mistaken identity, these friends find themselves thrown into the deep end, when a royal wedding they’re asked to assist with is suddenly interrupted, and the three of them soon find themselves on an extended holiday from any sense of reality they ever knew.

We now have our own An Extended Holiday TVTropes Page:
A big thank you to wille179 for setting it up.
A/N: Now I would like you all to know first of all, this is a collaborative work between myself and some friends. So if you enjoyed this, why not stop by and say hello to the other three writers of this story. I have included their links at the bottom here.
Team Extended Holiday
American Brony - Writer
Teal Speckles - Writer
Shawn820 - Writer
OmniKitsune - Writer/Head Editor
Biker Dash - Editor

Big thanks to Shawn820 for the great cover art.
WARNING: There are spoilers in the comments. Read the comments at your own risk. By all means, please add to the discussions.