Editing Mystara (section)

===Notable adventure modules===
{| class="wikitable"
!Code!! Title!! Levels!!  Author(s)!! Published!! Notes
|-
|X1|| ''[[The Isle of Dread]]'' || 3–7
||{{ubl|[[David Cook (game designer)|David Cook]]|[[Tom Moldvay]]}}||1981||Introduces the Known World, the most notable nations of Mystara, and the Sea of Dread and the Thanegioth Archipelago to the south.
|-
|X4|| ''[[Master of the Desert Nomads]]'' || 6–9||[[David Cook (game designer)|David Cook]]||1983||Expands the world to the west with the introduction of the Sind Desert and the Great Waste.
|-
|X5|| ''[[Temple of Death]]'' || 6–10||[[David Cook (game designer)|David Cook]]||1983||Introduces the land of Hule, further expanding the world to the west.
|-
|X6|| ''[[Quagmire!]]'' || 4–10 ||[[Merle M. Rasmussen]]||1984||First adventure in the Serpent Peninsula, south of Sind.
|-
|X9|| ''[[The Savage Coast]]'' || 4–10||{{ubl|Merle M. Rasmussen|Jackie Rasmussen|[[Anne C. Gray]]}}||1985||Introduces the Savage Coast, southwest of Hule.
|-
|X10|| ''[[Red Arrow, Black Shield]]'' || 10–14||[[Michael S. Dobson]]||1985||The politics of the most notable nations and areas of the Known World are further expanded in this adventure.
|-
|X11|| ''[[Saga of the Shadow Lord]]'' || 5–9||Stephen Bourne||1986||Introduces the Kingdoms of Wendar and Denagoth, north of the most notable nations.
|-
|CM1|| ''[[Test of the Warlords (module)|Test of the Warlords]]'' || 15+ ||[[Douglas Niles]]||1984 ||First major adventure in the land of Norwold, northeast of the most notable nations.
|-
|M5|| ''[[Talons of Night]]'' || 20–25 || [[Jennell Jaquays]]{{efn|name=Credited|Credited as ''Paul Jaquays''.}}  || 1987 ||Adventure in the Isle of Dawn, within the Alphatian Empire.
|}