Voadam
Legend
I would say it is a bunch like 1e (boxed set) or 3e (LGG) Greyhawk, very grounded, ethnicities and kingdoms are important, has a ton of detailed gods (about fifty in the big gods book), and it takes things like natural geography even more seriously so all the rivers go out to seas from high ground origins for example and they put a lot of work into their maps and their atlas book. Humanocentric but big humanoid and demihuman populations. Greyhawk had tons of Gonzo 70s fantasy stuff particularly in modules, but the setting as presented in the setting sourcebooks had a lot of grounded and detailed fantasy medievalisms with knights and Arab kingdoms and ethnic migration patterns and such.How would you compare it to Greyhawk as far as flavor and playability?
I was more into Kenzer's Hackmaster stuff at the time, particularly their hacklopedias.
I never really got into Kalamar as a setting, it is just a bit too big and sprawling with a sort of down to earth D&D feel from what I have read of it. I feel it would take a full read through of the core setting book hardcover to get a real handle on it, which I have not done. I feel it would have benefited a lot from a 32 or 64 page gazetteer to initially get a handle on the setting like the first 1e folio or the 3e gazetteer.
I like that it has a hugely detailed out fantasy Africa with advanced civilizations in a giant hardcover sourcebook. The humanoids and demihumans are important and supported with sourcebooks. Hobgoblins in particular with big roman style militarized empires sort of set the standard for that trope and it is fairly core in the setting with big hobgoblin areas.
I did like their 3.5 monster book Dangerous Denizens: Monsters of Tellene a lot. It gives good monsters (a lot of mummies stand out in memory) with fantastic descriptions and world lore.