Fallout Equestria: The Crystal Heart is a crossover of Fallout 3, Fallout New Vegas, Fallout Equestria, and Fallout Equestria Project Horizons.

Littlepip is back, ready to tackle the Wasteland. After hearing a cry for help on the radio, she is set out onto another adventure. Though, it is not in her Wasteland, it's on a new frontier. Welcome, to the Crystal Empire!

Full of adventure, Littlepip and her friends, along with some new friends, endure death, loss, love, adventure, and have to make a decision that will determine the future of the whole Wasteland.

Will Littlepip help the Outpost ponies defeat King Sombra, retrieve the Crystal Heart, and protect the Empire, or will she side with the Steel Rangers, and go to the Canterlot Ruins, find the spell Star Swirl the Bearded made to go back in time, and try to prevent the fallout from ever happening?