The Abyss

The Abyss is a single-stage overseer quest in Fallout Shelter.

Walkthrough
This quest has the one of the largest number of rooms. It has radroaches, radscorpions, molerats, and deathclaws as enemies. The deadliest enemies here is an alpha deathclaw with a regular deathclaw, and an irradiated radscorpion with two regular radscorpions. Keep your dweller's health high in these fights.