1990
The tenth year of Mystara’s publication. Products included the Hollow World Campaign Set, GAZ13, and PC3. The Voyage of the Princess Ark began in Dragon 153.
- Alatian Islands
- Alphatia
- Alphatian Sea
- Arm of the Immortals
- Bellissaria
- Blackmoor
- Borea
- Brun
- Chronological maps
- Davania
- Esterhold
- Fan-made maps
- Great Northway Lands
- Great Waste
- Hollow World
- Hule
- Hyborea
- Iciria
- Isle of Dawn
- Italian
- Known World
- Laterre
- Midlands
- Minaea
- News
- Norwold
- Ochalea
- Orc's Head Peninsula
- Outer World
- Patera
- Pearl Islands
- Replica maps
- Savage Coast
- Sea of Dread
- Sea of Steam
- Serpent Peninsula
- Skothar
- Suridal
- Updated maps
