| Title | Publisher | Year | Language | Documents |
|---|---|---|---|---|
| Saied | Robb Sherwin | 1998 | English | |
| Sea Quest Part 1 - Sea Wolf | Taras | 1998 | Russian | |
| Secret Agent | Gods of the Universe | 1998 | English | |
| Sello, El | Fernando del Casar Navazo | 1998 | Spanish | |
| Shore Leave | TSF's Workshop | 1998 | English | Solution, Map |
| Sisychickenphus | Lelah Conrad | 1998 | English | |
| Something About The Bunny | GLYPH | 1998 | English | Solution |
| Spacestation | David Magnus Ledgard | 1998 | English | Solution |
| SpeedIF3 - The Devil Made Me Do It | David A. Cornelson | 1998 | English | Solution, Map |
| Spider and Web | Andrew Plotkin | 1998 | English | |
| Spyder and Jeb | Neil deMause | 1998 | English | |
| Story of Morris the Chicken Being Helped by a Squirrel, The | Mikko Vuorinen | 1998 | English | |
| Suche nach Neros Harfe | Ralf Herrmann | 1998 | German |