What the hell is it with game developers who have no idea about the power of a license? Off the top of my head, I can think of three games from past, present, and future that serve as prime examples here.
(BYOND, which stands for Build Your Own Net Dream, is a freely distributed 2D online development suite. It provides an easier learning curve to create a game while still providing enough flexibility for a person to create a game that is truly their own. This is perhaps the best possible way to come into understanding the essence of games. For this reason, I believe BYOND deserves its own link here.)