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 one 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
The line "I ain't afraid of no ghost" is a direct reference to the song Ghostbusters by Ray Parker Junior.