Project Horizons is a side story spin-off of Fallout: Equestria, written by Somber. Up to Chapter 65, It has more than 1 M words, over 750K more than the original story Fallout: Equestria. It is one of two Fallout: Equestria spin-off stories approved by Fallout:Equestria's author, Kkat, to have it's own page on Equestria Daily, not meaning it is canon to her story (Kkat message about the approval: [Link] ). It has its own page on Equestria Daily.
Project Horizons follows the adventures of Blackjack, a security mare from Stable 99, whose discovery of a top-secret file of incredible importance sweeps her up in a massive conspiracy that has lasted ever since before the end of the Great War. She is forced out of her comfortable Stable life and is ejected into the wastelands surrounding the once-great industrial city of Hoofington, where she is daily confronted with its unique horrors.
Project Horizons principally takes place in a region known as The Hoof which is located east of the Equestrian Wastelands. The Hoof is named after the well-preserved ruins of the industrial city of Hoofington, which dominates its center. It also shares its universe with Heroes, since, as of chapter 49, a trade route going from Riverside to Dise was mentioned.
“Obviously, that’s why I zipped my mouth closed, then locked it with a key, then dug a hole, then buried the key, then built a house on top of the hole where I buried the key, then moved into the house on top of the hole.”
“Just because you’ve failed the sonic rainboom a hundred thousand times in practice doesn’t mean you won’t be able to do it in front of an entire stadium full of impatient, super-critical, sports-fan ponies.”
“I hope you’re happy! Both of you! You’ve ruined my very first slumber party. The makeover, the smores, the truth or dare, the pillow fight! I mean, is there anything else that could possibly go wrong?!”
“I've learned that one of the joys of friendship is sharing your blessings, but when there's not enough blessings to go around, having more than your friends can make you feel pretty awful. So, though I appreciate the invitation, I will be returning both tickets to The Grand Galloping Gala.”
“Well, there’s something here about a dragon, the kingdom falling, chaos reigning… Okay, apparently it was all because the prince and princess were so lost in each other’s eyes that they couldn’t perform their royal duties.”