Colony Zod
The Xenofex Assassination & Roland Rescue Walkthru
Map of Colony Zod Either Resurectra in Castle Lambent or Kastore in Castle Gloaming will assign this Quest.  Upon entering the Land of the Giants Archibald will contact you with the Quest to rescue his brother Roland.
Enter and make your way west to the end of the tunnels. Enter the room to the north and proceed to the Elevator.  At the top go to the Panel in the room.  There are 4 different shaped buttons on the panel, I do not believe there is any set way to press them but the following order worked for us: octagon, square, triangle point up, triangle point down.
After pressing the Buttons you have access to the holding cells in the west.  All contain some item of interest but the Cage in the SE holding cell is where you will find Roland.  He will give you a key that will open the way to dispose of Xenofex.
After obtaining the key head back to the elevator and return to ground level. Proceed back the way you came and enter the new tunnel that appeared to the north.
Take this Elevator up to the 2nd level and depress the Buttons on the pedestals in the east and west rooms.  Then proceed to the now open door that leads to yet another Elevator. This takes you to the 3rd floor Control Center like area, Xenofex awaits you here with his cronies.  He looks like a normal Devil Captain so inspect the bodies when the battle is over to be sure he didn't sneak off and hide in a room some where.
Land of the Giants