|Title||Zork I: The Great Underground Empire|
|Authors||Marc Blank and David Lebling|
|Release Number||Z-Code Version|
|820428||23||Old Standard (3)|
|820515||25||Old Standard (3)|
|840726||88||Standard (3) ¹|
|880113||5 (beta)||Advanced (5) ²|
The old "Folio" packaging of Zork I consisted of a blister pack (i.e. card with plastic tray) with either 5.25" disks or 8" disks. The only documentation was a piece of paper with the instructions.
The re-release of Zork I used the standard box format which consisted of a grey box with coloured horizontal stripes. It contained "The GUE: A History" by Froboz Munbar, an instruction manual, and a map.
The release of the Zork Trilogy included all three Zorks, "The GUE:
A History" by Froboz Munbar, a zorkmid, a map, a Bozbarland travel brochure,
a Grayslopes travel brochure, a stock certificate, and a letter from the
Chairman of the Board of FrobozzCo.