A Review of Interactive Fiction, by Daniel Gunnell (as FrobozCo International) (2019)
(1 rating)

Rider In The Mist, by Roy Mathur (2015)
(5 ratings)

Risorgimento Represso by Michael J. Coyne 2003 (40 ratings)

The Royal Puzzle, by Kenneth Pedersen (2017)

S.T.I.: Search for Terrestrial Intelligence by Roy Stead 1988

SceptreQuest by Sean Givan and Cardinal Teulbachs (1 rating)

Scroll Thief by Daniel M. Stelzer 2015 (9 ratings)

The Sealed Room by Robert DeFord 2012 (16 ratings)

The Search for the Nether Regions by Gareth Pitchford 1994

The Second Pit, by Sue Medley, Andrew Craig, and Tom Craig (1996)

self-care for wizards, by Kayla Bashe (2017)
(2 ratings)

Shogun by James Clavell, Dave Lebling 1989 (13 ratings)

The Smith's Stronghold, by Allan Porter (1984)
(1 rating)

Sorcellerie/Sorcery by Rafi Deryeghiyan 1985 (2 ratings)

Sorcerer by Steve Meretzky 1984 (54 ratings)

Sorcerer of Claymorgue Castle by Scott Adams 1984

Sorceror's Spire, by John Nelson (1985)
(1 rating)

Sorcery Is for Saps by Hilari Bell and Anna-Maria Crum 2016 (2 ratings)

The Sparkstone - Tales of Florb, by Roby Sherman (2019)

Spellbreaker by Dave Lebling 1985 (47 ratings)