. . "The Known World is the designation for the generic BECMI Dungeons & Dragons campaign world. It was based on the implicit setting of the Basic, Expert, Companion, and Master sets. This setting was later developed into Mystara as a formal setting."@en . . "The Known World is the designation for the generic BECMI Dungeons & Dragons campaign world. It was based on the implicit setting of the Basic, Expert, Companion, and Master sets. This setting was later developed into Mystara as a formal setting."@en . . . . "This is not a definitive list, but major islands or island groups of particular size and significance:"@en . "This is not a definitive list, but major islands or island groups of particular size and significance:"@en . . . "The Known World"@en . . . .