Software design patterns for enabling auto dynamic difficulty in video games

Auto dynamic difficulty is the technique of automatically changing the level of difficulty of a video game in real time to match player expertise. In this paper, we describe a collection of software design patterns for enabling auto dynamic difficulty in video games. The benefits of a design pattern approach include more reusability and lower risk compared to traditional ad hoc approaches. We implemented these design patterns as a proof-of-concept prototype system using Pac-Man as a test-bed.