Zork I (Microcomputer Version) by Infocom

The Hitchhiker's Guide to the Galaxy, by Steve Meretzky and Douglas Adams (Infocom)

Zork III (Infocom)

Mainframe Version of Zork (Infocom)

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

Deadline by Marc Blank (Infocom)

Bureaucracy, by Infocom

Suspended by Mike Berlyn (Infocom)

Trinity by Brian Moriarty (Infocom)

Infidel by Mike Berlyn (Infocom)

Starcross by Dave Lebling

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

The Lurking Horror, by Dave Lebling (Infocom)

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

Spellbreaker (ARCHMAGE, MAGE, ZORK 6) by Dave Lebling (Infocom)

Arthur: The Quest for Excalibur, by Bob Bates of Infocom (1989)

Border Zone, by Marc Blank (Infocom)

Hollywood Hijinx, by Hollywood Dave Anderson (Infocom)

Ballyhoo, by Jeff O'Neill (Infocom)

Nord and Bert Couldn't Make Head or Tail of It, by Jeff O'Neill (Infocom)

Suspect, by Dave Lebling (Infocom)

Wishbringer: The Magick Stone of Dreams (Solid-Gold Edition) by Brian Moriarty (Infocom)

Infocom Sampler (A 1984 Compilation of Example Infocom Games)

1982 Mini-Zork Variant (Sampler) (Infocom)

Sampler Edition of Zork (1987 Version) (Infocom)

German-Language Translation of Zork (Unreleased) (Infocom)

Different versions of original mainframe Zork reconstructed and patched to run under Confusion.

PDP-10 Muddle

The (original) ZIL Tool Chain