z-machine

Zork I (Microcomputer Version) by Infocom

Zork I (Microcomputer Version) (Solid-Gold Edition) by Infocom

Zork III (Infocom)

Zork II (Microcomputer Version) (Infocom)

Zork Zero: The Revenge of Megaboz, by Steve Meretzky of Infocom (1988)

Deadline by Marc Blank (Infocom)

Beyond Zork: The Coconut of Quendor by Brian Moriarty (Infocom)

Bureaucracy, by Infocom

The Restaurant at the End of the Universe (Incomplete, Unreleased) (Infocom)

Trinity by Brian Moriarty (Infocom)

The Interactive Fiction Virtual Machines Suite - in Javascript

Infidel by Mike Berlyn (Infocom)

Stationfall, by Steve Meretzky (Infocom)

The Lurking Horror, by Dave Lebling (Infocom)

Leather Goddesses of Phobos Gold Edition, by Steve Meretzky (Infocom)

Starcross by Dave Lebling

Wishbringer: The Magick Stone of Dreams by Brian Moriarty (Infocom)

James Cameron's The Abyss (Unfinished, Unreleased) by Bob Bates, Infocom

Leather Goddesses of Phobos, by Steve Meretzky (Infocom)

The Witness, by Stu Galley (Infocom)