Zork I (Microcomputer Version) by Infocom
The Hitchhiker's Guide to the Galaxy, by Steve Meretzky and Douglas Adam...
Zork III (Infocom)
Zork I (Microcomputer Version) (Solid-Gold Edition) by Infocom
Planetfall, by Steve Meretzky (Infocom)
Zork II (Microcomputer Version) (Infocom)
Trizbort, the Interactive Fiction Mapper
Deadline by Marc Blank (Infocom)
Beyond Zork: The Coconut of Quendor by Brian Moriarty (Infocom)
Enchanter (Zork IV) by Marc Blank and Dave Lebling (Infocom)
Bureaucracy, by Infocom
Trinity by Brian Moriarty (Infocom)
Suspended by Mike Berlyn (Infocom)
Infidel by Mike Berlyn (Infocom)
Stationfall, by Steve Meretzky (Infocom)