Good problem statements tell both your goal and your constraints.

Foundational rules are a mathematical representation of game state and how and when it changes.

by taking a cultural anthropologist’s approach to our players, interviewing them, learning everything we can about them, and putting ourselves in their place,

A good toy is an object that is fun to play with.

players should never spend so much time in a sub-game that they forget what they were doing in the main game.

pay closer attention to your thoughts, your feelings, your emotions, and your dreams, for those are the ways the subconscious communicates.

— it is a matter of knowing the ideas of game design

when we aren’t happy with how we are judged, we work hard until we are judged favorably.

Written Rules: These are the “rules that come with the game,”