Fallout Equestria: Surviving Light

Vanilla Cream, a highly intelligent citizen of Stable 81, has the brilliant idea of using the Stable Door as a resource. This opens the Stable up to the hostile wasteland outside. And the Stable remains peacefully ignorant of the hostilities for several days. At least, until one day, a large group of Feral Ghouls enter Stable 81, and immediately start attacking its citizens. Now, Vanilla has a new goal; she must enter the dark and hostile wasteland to search for a new source to use as the Stable door.