This is the original version of ZORK is called DUNGEON and is written in the MDL programming language by members of the MIT Dynamic Modeling Group. This is “Version MARCH 30” written in 1978 and is available under TOPS-20 on the XKL TOAD-2. ZORK was later released as a commercial product in 1980.
Toad-2 at Living Computers: Museum + Labs, TOPS-20 Monitor 7(110131)-1 Welcome to the Toad-2 System running TOPS-20 at Living Computers! @noaccount Password: unguessablewords Job 27 on TTY30 13-Apr-2020 7:12PM Previous LOGIN: 13-Apr-2020 5:40PM End of COMAND.CMD.1 @zork The dungeon is available for exploring Monday thru Friday: 00:00 - 24:00 It is also open weekends and holidays. Welcome to Dungeon. This version created March 30. You are in an open field west of a big white house, with a boarded front door. There is a small mailbox here. >open mailbox Opening the mailbox reveals a leaflet. >get leaflet Taken. >read leaflet WELCOME TO DUNGEON DUNGEON is a game of adventure, danger, and low cunning. In it you will explore some of the most amazing territory ever seen by mortal man. Hardened adventurers have run screaming from the terrors contained within! In DUNGEON the intrepid explorer delves into the forgotten secrets of a lost labyrinth deep in the bowels of the earth, searching for vast treasures long hidden from prying eyes, treasures guarded by fearsome monsters and diabolical traps! No PDP-10 should be without one! DUNGEON was created at the Programming Technology Division of the MIT Laboratory for Computer Science, by Tim Anderson, Marc Blank, Bruce Daniels, and Dave Lebling. It was inspired by the ADVENTURE game of Crowther and Woods, and Dungeons and Dragons, by Gygax and Arneson. DUNGEON is written in MDL (alias MUDDLE). On-line information may be available using the HELP and INFO commands (most systems). Direct inquiries, comments, etc. by Net mail to DUNGEON@MIT-DMS. (c) Copyright 1978 Massachusetts Institute of Technology. All rights reserved.