The other thing to understand about, game design techniques, is that it involves a way of thinking. It's not just a set of practices, but it's a way to approach the challenges that you have. And so, later on the course, I will talk in much more detail, but just what that mean to think like game designer. The third piece here is non-game context. And here we mean anything other than the game for its own sake. So, when you're playing a game, you're playing to have fun in the game. But if you are playing say, for reasons that relate to your business. You're playing because you are serving some objective of your company or you're playing because you're trying to learn something that's relevant to your work. Or you're playing to get a job.