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Thus, I reorganized my separate regional d20 tables into one big honking d100 table broken out into predominant terrain types (arctic, badlands, forest, desert, and so on) similar to what was done in the DMG. The table can be downloaded here (.pdf) should you good readers wish to use it as-is, or here (.docx) if you'd like to tinker and customize it.
The creatures on the table include a few of the regular suspects from the Monster Manual (it goes without saying that I mean the AD&D version--but I guess I just said, or wrote, it anyway!) But with this campaign setting I wanted to mine the other monster manuals for lesser-known and/or infrequently-used critters. For example, monsters such as the crysmal, kampfult, solifugid and xag-ya from Monster Manual II, and the caterwaul and skulk (and the humanoid aarakocra, grimlocks and quaggoths) from the Fiend Folio will turn up randomly in some areas of the Wastelands.
I also included the thanoi, or walrus men, from the Dragonlance Adventures book (and DL6 Dragons of Ice). Mostly because I like the idea of warrior walrus men. I never liked much from Dragonlance, but I always thought the thanoi were cool. Coo coo ca choo! Bad puns intended. ;-)