Introduction
Zork was originally written by Tim Anderson, Marc Blank, Bruce Daniels, and Dave Lebling. The commercial versions are copyright 1981 (etc) by Infocom, then Activision, then renamed to Mediagenic, then Bobby Kotick bought it and renamed it Activision, then Vivendi bought it and merged it with Blizzard, then Microsoft consumed the lot.
Thus, the Zork 1 source code is copyright 2025 by Microsoft. As of November 2025, it is open source under the MIT license. Thanks to Microsoft for making this project completely legal!
The Visible Zorker Project was created by Andrew Plotkin. MIT license; Github repo. Hosted by the Obsessively Complete Infocom Catalog.
Source files
- zork1.zil (56 lines)
- 1actions.zil (4123 lines)
- 1dungeon.zil (2664 lines)
- gclock.zil (66 lines)
- gglobals.zil (316 lines)
- gmacros.zil (162 lines)
- gmain.zil (295 lines)
- gparser.zil (1193 lines)
- gsyntax.zil (547 lines)
- gverbs.zil (2103 lines)