A fictional world created by
Greg Stafford, an american shamanic hippy. Allegedly invented as a method of pulling girls, he initially just wrote stories about this magical world of
myths and heroes. Later it became a setting for a
role playing game called
RuneQuest, and is now the subject of a new game,
HeroQuest (formerly
Hero Wars.
King of Dragon Pass is a Mac and PC computer game set in the world of Glorantha, see http://a-sharp.com/opal/.
More at http://www.glorantha.com/.