ZORK: The Great Underground Empire - Part I Copyright (c) 1980 by Infocom, Inc. All rights reserved. ZORK is a trademark of Infocom, Inc. Release 2 / Serial number AS000C The Zork I Release 2 game file was extracted from a self-booting, copy-protected TRS-80 Model I disk. The disk itself was not an original and did not come with a label or packaging, but it seems to have been the early Personal Software release. The game file is clearly a legitimate, earlier version than Release 5, including some bugs that were fixed in releases 5 and later. Use the zpat (zcode-patch) utility and a copy of Zork I Release 88 to reconstruct zork1_2.dat from zork1_88_to_2.pat.