Go down the stairs. Kill the dwarves at the bottom. You can go either left or forward. Go forward and kill the dwarves on the way.
At the top of the stairs on the right side is a tower object. It is the level 3 upgrade shield spell. Have your minions grab it.
Go back and take the left path this time. At the doors flip the switch that is to the right of door.
This will make the dwarves unhappy. The dwarves will open the door and attack. Have your minions deal with them.
There is a rod piece for the broken wheel here. Have a minion grab it.
Go through the door to the right. Follow the path to the stairs on the left. There will be dwarves at the bottom of stairs. Kill them with your minions.
Go up the stairs across from the ones you just came down. Across the pipe is a lever. Send a minion to throw the lever.
The door near the lever will open and a dwarf comes out. Send your minions to kill him. Now the door near the Overlord opens. Two dwarves come out. Have your minions kill the dwarves.
Inside the room are three rocket launcher dwarves. Kill the dwarves.
Go back to the bottom of the stairs. Go to the left and break the boxes. At the end of this path is stairs to the right and left.
Go up the stairs to the left. Have your minions kill the dwarves. At the top, go right.
There should be an open door to the left. Inside is a dwarf and loot. Kill the dwarf so that he won't attack from behind.
When you walk out the door straight ahead is a pipe the minions can walk on. Send your minions to kill the two dwarves at the bottom.
After the dwarves are dead, have a minion throw the lever. This opens the door to the left.
Two more dwarves come out. Have your minions kill these dwarves. The door to the right opens.
Go back to the stairs you used to get here. Go up the other stairs and enter the door you just opened. There will be a rocket dwarf at the door.
Follow the hallway to the left and back around to the right killing dwarves as you go. At the end will be a wheel to make a bridge back to the broken wheel for elevator. Have your minions turn this wheel.
Go back through the door and to the right is a red rod piece for broken wheel. Have a minion grab it.
From the wheel piece go back down the hallway and to the right is a dwarven keg. Have the minions push it.
It opens a treasure trove. Loot the hidden treasure and then go back to the elevator. Have your minions turn the wheel.
This will bring the elevator up. Also a door to the left of the elevator will open. Four dwarves come out. Have your minions kill the dwarves.
Get on the elevator. As soon as you start to walk a cut scene begins. There are two levers to open the door. There is one lever on each side. This is a fun part. There are rocket dwarves, where you can't reach them. Sweep the platforms of dwarves with browns. You will lose some.
Then guard marker all the minions and call one brown. Sweep this one minion to the lever.
Repeat for the other side. This opens the door and four dwarves come out. Kill them with your minions.
Once the dwarves are out of the way, go in the door. Inside the room is the dwarven keg. When you start to move the keg, dwarves will attack.
So drop the keg and attack the dwarves. When the dwarves are dead grab the keg. More dwarves may appear. Just kill them and move the keg.
Once the keg is in the tower, get on the elevator. Back on the first floor go through the door to the left.