“Play is free movement within a more rigid structure.” PlayMovementStructureFree Movement Book:Rules of Play: Game Design Fundamentals Source: Rules of Play: Game Design Fundamentals
“Play is the way that human beings learn about the world. That's how we discover how things work.” WorldWayHumansPlayHuman Beings Author:Katie Salen
“A game is a system in which players engage in an artificial conflict, defined by rules, that results in a quantifiable outcome.” GamesResultsPlayerConflictDefinedOutcomesArtificial Book:Rules of Play: Game Design Fundamentals Source: Rules of Play: Game Design Fundamentals