I wouldn't say. It's a bit of a stretch what you say. It wasnt a mile stone in any of it. It was just ok/good. As combined D3 was just good not the greatest of all time. D2 also was just avarage or below avarage :P All Diablo games were great not because of graphics and animations but because of gameplay (ok, except diablo1 it was a really milestone and born of new genre).