Ghostly Gag

Ghostly Gag is a limited time overseer quest in Fallout Shelter, available during the fall season.

Walkthrough
This quest takes place in a vault. Only 1 dweller can be taken on this quest. Enemies are exclusively raiders in groups of one to three. The raider boss is accompanied by one more raider. Though the objective is to kill the raider boss, a fight can be avoided if "Boo!" is selected among the dialogue options when speaking to her. Whether the raider boss is killed or not, she will yield a skeleton costume and at least a rare or legendary quality junk.

Behind the scenes
Some of the quotes throughout the quest such as "I ain't afraid of no ghost" are from the film Ghostbusters.