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Developer Chris Spiegel
Format Z-code
Interaction style
Systems Windows, macOS, Linux
System details
Latest version 2.1.2 / 14 Dec 2023
Status Stable
Uses interpreter
Used byEmglken, Gargoyle, Spatterlight
Multimedia support Color


License GPL
Notes Note that this interpreter cannot simply be downloaded and run to play game files.
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Bocfel is an interpreter for the Z-machine, made by Chris Spiegel.

It fully supports Z-machine versions 1-5, 7, 8, and contains partial support for version 6.


  • Almost no platform-specific functions are used—and those that are used are optional—so almost any system with a recent C compiler should be able to build and run Bocfel.
  • Makes use of Glk for input/output, with complete support for Gargoyle; a non-Glk "dumb" interface is also available.
  • Support (assuming a font with Unicode box-drawing characters) for the character graphics font used by Beyond Zork.
  • Unicode support.
  • Multiple undo in almost all games, including those which do not natively support it.
  • Full control over command recording, transcripting, and command-record playback.
  • Rudimentary "cheating" support, designed to disable hunger and thirst daemons.


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