Game design is the process of creating and shaping the mechanics, systems, and rules of a game. Games can be created for entertainment, education, exercise, or experimental purposes. Increasingly, elements and principles of game design are also applied to other interactions, in the form of gamification. Game designer and developer Robert Zubek defines game design by breaking it down into its elements, which he says are the following:
Gameplay, which is the interaction between the player and the mechanics and systems
Mechanics and systems, which are the rules and objects in the game
Player experience, which is how users feel when they are playing the game
Games such as board games, card games, dice games, casino games, role-playing games, sports, video games, war games, or simulation games benefit from the principles of game design.
Academically, game design is part of game studies, while game theory studies strategic decision making (primarily in non-game situations). Games have historically inspired seminal research in the fields of probability, artificial intelligence, economics, and optimization theory. Applying game design to itself is a current research topic in metadesign.
Sports (see history of sports), gambling, and board games are known, respectively, to have existed for at least nine thousand, six thousand, and four thousand years.
Tabletop games played today whose descent can be traced from ancient times include chess, go, pachisi, backgammon, mahjong, mancala, and pick-up sticks. The rules of these games were not codified until early modern times and their features gradually evolved and changed over time, through the folk process. Given this, these games are not considered to have had a designer or been the result of a design process in the modern sense.
After the rise of commercial game publishing in the late 19th century, many games that had formerly evolved via folk processes became commercial properties, often with custom scoring pads or preprepared material.