I had heard that Blackmoor was older than Greyhawk (but held back), but had not heard that Barsoom had been used by TSR in Warriors of Mars: The Warfare of Barsoom in Miniature before.ripvanwormer wrote:The first D&D campaign world is Blackmoor (which obviously wasn't part of Greyhawk before Greyhawk existed); the first published D&D campaign world might arguably be Barsoom, because TSR's Warriors of Mars game had notes on using it with D&D, and the original D&D set listed Barsoomian encounters. There's not really anything that's Greyhawk-specific in published original D&D in the same way that the Barsoomian elements are Barsoom-specific.
According to the page that ripvanwormer linked to Edgar Rice Burroughs's estate forced TSR to shut down the book. But if copyright law was not stupid, we might have seen an entire range of Barsoom sourcebooks.
With the price of TSR's illegal book apparently being $599.99, I don't suppose anyone here has seen it. But I think a couple of other people have done stuff with Barsoom (maybe under licence).
Has anyone here done anything with Barsoom?