Main mission - Uninvited Guests | Act 4 Dungeon Siege III Guide

After the Queen (M30,1) orders you to clear the tunnels, head to the western tunnels (M29,2). On your way you will come across Roderick (M29,3), who will ask you to find his soldiers (Building Bridges). During the exploration of the underground you will probably also find powder satchels (M29,4) that will come in handy in blowing up the tunnels (M29,6).

You will have to fly quite a bit...

One defeated boss and one spectacular explosion later, return to the Queen. If you had already completed Enemy at the Gates, Ebb and Flow will be activated.

M30 - Southern Mining Tunnels

M29 - Deep Well