We saw that in trying to be more flexible with our game object, a lot of behavior was factored into the base class. We also said that it would be nice to attach a behavior at runtime and have it detach itself when we are done with it.

There are actually two design patterns that have the potential to help our design, the Strategy pattern and the Decorator pattern. The Strategy pattern is all about encapsulating sets of behaviors instead of inheriting. The Decorator pattern is all about dynamically adding responsibilities as needed.