Apogee had made some fun shareware titles back in the days of DOS gaming, but one of the troubles a large number of their games had was that buying their full versions didn't actually get you any new features, just more levels. Dark Ages is one such example of this since the free shareware episode is fairly decent, but the second and third episodes you originally had to pay for were just more of the same. :P Good thing the ENTIRE game is freeware now.