The Wizard's Tower by Nathan D'Silva and Errol

Wizard's Warrior, by Dave Hawkins (1987)

The Wizard, by M. Gordon-Kerr (1984)

Wizard, What Wizard?, by Simon D. Allan (2007)

Wizardry Level C by Jac Colvin 2016

The Wonderful Wizard of Oz, by Anonymous (1985)
(1 rating)

Worlds Apart by Suzanne Britton 1999 (81 ratings)

Wrenhold's Secret Vigil, by Robert Davis (1986)
(1 rating)

Yon Astounding Castle! of some sort by Tiberius Thingamus 2009 (7 ratings)

Zegrothenus by Poster 2010 (6 ratings)

Zombie Wizard of the Apocalypse, Episode 1 by Andrew Watt 2014 (7 ratings)

Zombie Wizard of the Apocalypse, Episode 2 by Andrew Watt 2014 (1 rating)

Zombie Wizard of the Apocalypse, Episode 3 by Andrew Watt 2014 (2 ratings)

Zork, by Tim Anderson, Marc Blank, Bruce Daniels, and Dave Lebling (1979)
(30 ratings)

Zork 285 by Tim Anderson, Marc Blank, Bruce Daniels, and Dave Lebling 1977

Zork I by Marc Blank and Dave Lebling 1980 (197 ratings)

ZORK I ITA, by Whovian (Bruno Bucciotti) [programming] Ragfox [translation] (1980)
(2 ratings)

Zork III by Dave Lebling, Marc Blank 1982 (68 ratings)

Zork LXIX: The Great Underground Hot Dog, by Bob Reeves (2011)
(5 ratings)

Zork N plus 9, by Sonny Rae Tempest (2012)
(1 rating)