| Code,Title,Levels,Author(s),Published,Notes | |
| X1,The Isle of Dread,3–7,David Cook Tom Moldvay,1980,Included in Expert Set. Ranked 16th greatest adventure of all time | |
| X2,Castle Amber,3–6,Tom Moldvay,1981,Ranked 15th greatest adventure of all time | |
| X3,Curse of Xanathon,5–7,Douglas Niles,1982,- | |
| X4,Master of the Desert Nomads,6–9,David Cook,1983,Nomads Pt 1 | |
| X5,Temple of Death,6–10,David Cook,1983,Nomads Pt 2. Given 10/10 by White Dwarf. | |
| X6,Quagmire!,4–10,Merle M. Rasmussen,1984,- | |
| X7,The War Rafts of Kron,9–12,Bruce Nesmith,1984,- | |
| X8,Drums on Fire Mountain,5–8,Graeme Morris Tom Kirby,1984,UK made | |
| X9,The Savage Coast,4–10,Merle M. Rasmussen Jackie Rasmussen Anne C. Gray,1985,- | |
| X10,"Red Arrow, Black Shield",10–14,Michael S. Dobson,1985,"Battlesystem required; uses elements introduced in X4-X5, but not a continuation of that series as such" | |
| X11,Saga of the Shadow Lord,5–9,Stephen Bourne,1986,- | |
| X12,Skarda's Mirror,5–8,Aaron Allston,1987,- | |
| X13,Crown of Ancient Glory,7–10,Stephen Bourne,1987,Requires Companion Set | |
| XL1,Quest for the Heartstone,5–10,Michael L. Gray,1984,Tie in to action figures. Given 4/10 by White Dwarf. | |
| XSOLO,Lathan's Gold,4–6,Merle M. Rasmussen,1984,Solo Module | |
| XS2,Thunderdelve Mountain,7–9,William Carlson,1985,Solo Module | |