The Mane Six are joined by three others in a quest to use the Elements of Harmony one last time, as a brewing war between Tartarus and the free creatures of the world threatens to destroy Equestria forever.
Humanity's space exploration ultimately took the form of billions of identical probes, capable of building anything (including astronauts themselves) upon arrival at their destinations. One lands in Equestria. Things go downhill from there.
The Fire of Friendship that once united ponykind has all but faded. One thousand years ago, Equestria fractured... those who disagreed with Celestia's rule left under the leadership of Princess Luna to found their own nation, their own way of life.
Twilight is teleported to Blood Gulch Canyon after meddling with a ship that crash landed in Equestria. She must enlist the help of the local red and blue soldiers to get home while unraveling a dark conspiracy linking her world to a shadowy agency.
Equestria rots from within and Princess Luna falls prey to the corruption of an evil Pony. Meanwhile, Rainbow Dash finds herself in the strangest world, one where her loyalty will truly become tested.
It's a bad old time not to follow Celestia. Her empire slowly spreads across earth, wiping away human achievements, and anti-pony HLF terrorists are the bane of many refugees. But one day, one of the worst of the HLF spares a filly and her mother....
In a universe where Equestria recently arrived on Planet Earth, Queen Chrysalis sits in chains. Now she must answer herself in front of this world's highest court - the International Criminal Court in the Hague, the Netherlands.
As it is said, true peace can only be granted through countless innocent lives. In hindsight, the ponies were never that different from humans. Ultron’s plan is not over, and soon his strings will be severed for the last time.
MLP/Warhammer 40K crossover, part 5. The pieces are placed. The battle lines have been drawn. The 38th Company and Equestria fight relentlessly against the alien menace (the other one, that is), but the odds are hardly in their favor.
A cosmic accident has brought two 31st-century mercenary units to Equestria. Any hope for peace is destroyed as greed flares and battle lines are drawn, and the ponies find themselves thrust into the horrors of war. Will they rise to the challenge?
Over a year later after the terrible aftermath of the Decepticon invasion, Princess Twilight discovers something deep within the Everfree Forest, something not of her world.
Nolan Anderson, a member of S.W.A.T., is teleported to Equestria during a mission. In this new land, humans have taken over and enslaved a sentient pony species. He must find a way back to Earth, while both sides hate him for different reasons
MLP/Warhammer 40K crossover, part 3. As relations between Equestria and 38th Company wax and wane, the Tau warriors of the Sept Lamman put the final phase of their plan into action.
Sunset Shimmer, purged of her inner evil by the Elements of Harmony, prematurely returns to Equestria. There, she is given the chance to learn the values of friendship first-hand.