Vault 789 (quest)

Vault 789 is a single-stage quest in Fallout Shelter. This quest can be found in a random container during an unrelated quest. After the dwellers return to the Vault, the quest will be available in the overseer's office.

Walkthrough
The top floor of the vault has two separate pairs of raiders past the entrance room. On the second floor down is a pair of feral ghouls, and a pair of mole rats.

On the third floor is a pair of mole rats in the left room, and a mole rat broodmother accompanied by one mole rat. The mole rat broodmother can summon more mole rats.

On the fourth floor on the room to the right is a raider leader accompanied by two raiders. The raider leader drops a Wazer Wifle. The left room has a group of civilized ghouls who reward you with a pet carrier, a lunchbox, T-45a power armor, and four bottles of Nuka Cola Quantum.

The fifth floor has a mole rat broodmother accompanied by another mole rat in the room to the right.

The bottom floor has a pair of raiders, a group of three feral ghouls, a mole rat broodmother accompanied by another mole rat, and a final pair of raiders in the last room.