The following patterns are present in Pac-Man:
- Escalating Complications: Pac-Man is a rather nice example of the Escalating Complications pattern. The Task is to eat the dots, The complication mechanism is realized by the increasing difficulty to get to the few remaining ones. Meanwhile, the ghosts give chase threatening Pac-Man. Luckily, Pac-Man has some 'Power ups' to eat and get rid of the ghosts.
The old diagram
Ethan Kennerly's extention of the diagram