The Great Underground Empire
ZORK I: The Great Underground Empire Copyright (c) 1981, 1982, 1983 Infocom, Inc. All rights reserved. ZORK is a registered trademark of Infocom, Inc. Revision 88 / Serial number 840726 Episode 1 of Zork Zorkian/Cave crawl 1980 Many strange tales have been told of the fabulous treasure, exotic creatures, and diabolical puzzles in the Great Underground Empire. As an aspiring adventurer, you will undoubtedly want to locate these treasures and deposit them in your trophy case.