Credits & licenses
Original stories remain the work of their credited authors. No endorsement is implied. Zork trademarks are not granted by the source licenses. These games are free to play; they are not all graded readers.
Zork I: The Great Underground Empire
By Marc Blank, Dave Lebling, Bruce Daniels & Tim Anderson · MIT License
Compiled locally with ZILF 1.9 from the canonical source repository covered by the 2025 Microsoft, Xbox, and Activision MIT grant. Trademarks are not licensed.
Zork II: The Wizard of Frobozz
By Marc Blank, Dave Lebling, Bruce Daniels & Tim Anderson · MIT License
Compiled locally with ZILF 1.9 from the canonical source repository covered by the 2025 Microsoft, Xbox, and Activision MIT grant. One misplaced source bracket was repaired for compilation; trademarks are not licensed.
Zork III: The Dungeon Master
By Marc Blank, Dave Lebling, Bruce Daniels & Tim Anderson · MIT License
Compiled locally with ZILF 1.9 from the canonical source repository covered by the 2025 Microsoft, Xbox, and Activision MIT grant. Trademarks are not licensed.
Mini-Zork I
By Infocom · Public domain
The Z-Machine Standards Document explicitly identifies Mini-Zork I as public domain; this is the archived promotional demo story file.
Infocom Sampler I
By Infocom · Public domain
The Z-Machine Standards Document explicitly identifies both Infocom samplers as public domain; this is Release 55.
Infocom Sampler II
By Infocom · Public domain
The Z-Machine Standards Document explicitly identifies both Infocom samplers as public domain; this is Release 97.
Mini-Cluedo
By Daniel M. Stelzer · Public domain
The IF Archive catalog explicitly labels this Dialog demonstration public domain.
Figaro
By Victor Gijsbers · GPL v3
The IF Archive catalog explicitly records GPL v3. The matching source archive and GPL text are included under /sources and /licenses.
Original source · Story file · Complete corresponding source · GPL v3 license
ZenFactor Spa
By Tristano Ajmone · Public domain
The IF Archive catalog explicitly labels the work public domain.
Estado Profundo
By n-n · CC BY-SA 4.0
The IF Archive catalog explicitly records CC BY-SA 4.0. The original archive, including Inform 7 source, is included under /sources.
Original source · Story file · Original archive with source · CC BY-SA 4.0
License notices
Zork I MIT notice · Zork II MIT notice · Zork III MIT notice
The story files are unchanged from the local library. The library’s Zork II compilation includes its previously documented bracket repair. No past play sessions, saved games or personal transcripts are distributed.
Public-domain archive references: Mini-Zork and Infocom samplers, Mini-Cluedo, ZenFactor Spa.
Interpreter
Parchment / Bocfel, with the Lantern structured transport adapter. Upstream source and dependency notices.
PARCHMENT · BOCFEL · ASYNCGLK · EMGLKEN · REMGLK
The Missing Invitation
Original beginner adventure by Eliabi Pereira. Scene artwork belongs to this original adventure; it is not used to illustrate unrelated classic games.
Not included
Book and Volume, by Nick Montfort, carries CC BY-NC-SA 2.5 terms. It is withheld pending review for this platform’s planned commercial use. Parlez-lui d’amour was already excluded from the rebuilt library because its Creative Commons variant was unspecified and its story format unsupported.