Ultima Underworld: The Stygian Abyss — you are the Avatar, the noblest of heroes. In your time, you have seen many wonders and proven that you are the master of many dungeons. But nothing in your experience has prepared you for this: the horror-filled corridors of Britain's underworld. In this epic adventure, you, the Avatar, will join the leaders of Britain at Lord British's castle for a celebration commemorating the defeat of the Guardian forces a year ago. Suddenly, the Guardian strikes again, encasing the building in a giant piece of black rock.