Use Your Loaf, by Unknown (1992)

Valley of the Minotaur, by Nicolas van Dyk (1983)
(2 ratings)

Valley Of Treasures, by Charles Grey (2011)

The War-Torn Kingdom by SD Separa, Dave Morris, Jamie Thomson 2020

Warp by Rob Lucke and Bill Frolik 1979 (3 ratings)

The Witch's Bakery by Mona-Mae 2018

Yak Shaving for Kicks and Giggles! by J. J. Guest 2008 (3 ratings)

Yes, Another Game with a Dragon!, by John Kean (2000)
(27 ratings)

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

Zork I by Marc Blank and Dave Lebling 1980 (195 ratings)

Zork Zero by Steve Meretzky 1988 (51 ratings)

Zorkian Stories 1: G.U.E. by Marshal Tenner Winter 2012 (13 ratings)

Zyll by Marshal Linder and Scott Edwards (IBM) 1984 (1 rating)