Fallout Shelter Invader Motel - Deathclaws check in...
The goal is this: Kill invaders quickly. You can do this by concentrating strong weapons in the center first floor room, and only having ONE elevator - the one between the Vault Door and the center first floor room. That way, invaders run into the far right room, see no way down, and are foced to run back into the central room for another dose of death.