In the third game of the adventure game series Zork, you are once again a nameless adventurer, only this time you won't travel through a beautiful magical land, but are immediately cast into a deep dungeon. Like in a dream, you hear a mysterious voice telling you that you have passed all the tests but one. When conscience returns to you, you find yourself on the endless spiral of stairs, with only your trusty lantern near you... will you be able to survive the horrors of the Dungeon?

As your adventure begins, your greatest challenge beckons as you take the final step down into the very heart of the Great Underground Empire. Your character and courage will be tested as the enigmatic Dungeon Master confronts you with predicaments and perils. Your quest hinges upon discovering his secret purpose, even as he oversees your ultimate triumph - or destruction!