moria

moria /mor'ee-*/ n.  Like {nethack} and {rogue}, one
   of the large PD Dungeons-and-Dragons-like simulation games,
   available for a wide range of machines and operating systems.  The
   name is from Tolkien's Mines of Moria; compare {elder days},
   {elvish}.  The game is extremely addictive and a major consumer
   of time better used for hacking.