Heroes of Might and Magic II was pretty good. I don't know how to tell if something's mainstream or not, I don't do a lot of gaming and my knowledge of a game is most likely no more than "Picked it up at a Garage Sale, it's good shit," but Neverwinter Knights (forget that it's Forgotten Realms) is an interesting fantasy RPG. The main reason I like it is the easy-to-use campaign editor.
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