Zork I is a 1980 interactive fiction game written by Marc Blank, Dave Lebling, Bruce Daniels and Tim Anderson and published by Infocom.
"It is mostly important to note that there is currently no known way to compile the source code in this repository into a final "Z-machine Interpreter Program" (ZIP) file using an official Infocom-built compiler. There is a user-maintained compiler named ZILF that has been shown to successfully compile these .ZIL files with minor issues. There are .ZIP files in some of the Infocom Source Code repositories but they were there as of final spin-down of the Infocom Drive and the means to create them is currently lost."
Last modified 23 December 2025