A game is a structured activity, usually undertaken for enjoyment and sometimes used as an educational tool. Games are distinct from work, which is usually carried out for remuneration, and from art, which is more concerned with the expression of ideas. However, the distinction is not clear-cut, and many games are also considered to be work (such as professional players of spectator sports/games) or art (such as jigsaw puzzles or games involving an artistic layout such as Mahjong solitaire).

Key components of games are goals, rules, challenge, and interaction. Games generally involve mental or physical stimulation, and often both. Many games help develop practical skills, serve as a form of exercise, or otherwise perform an educational, simulational or psychological role. According to Chris Crawford, the requirement for player interaction puts activities such as jigsaw puzzles and solitaire "games" into the category of puzzles rather than games.

Attested as early as 2600 BC, games are a universal part of human experience and present in all cultures. The Royal Game of Ur, Senet, and Mancala are some of the oldest known games.

Definitions

Ludwig Wittgenstein

Ludwig Wittgenstein was probably the first academic philosopher to address the definition of the word game . In his Philosophical Investigations , Wittgenstein demonstrated that the elements of games, such as play, rules, and competition, all fail to adequately define what games are. He subsequently argued that the concept "game" could not be contained by any single definition, but that games must be looked at as a series of definitions that share a "family resemblance" to one another.

Roger Caillois

French sociologist Roger Caillois, in his book Les jeux et les hommes (Games and Men) , defined a game as an activity that must have the following characteristics:

  • fun : the activity is chosen for its light-hearted character
  • separate : it is circumscribed in time and place
  • uncertain : the outcome of the activity is unforeseeable
  • non-productive : participation is not productive
  • governed by rules : the activity has rules that are different from everyday life
  • fictitious : it is accompanied by the awareness of a different reality

Chris Crawford

Computer game designer Chris Crawford attempted to define the term game using a series of dichotomies:

  1. Creative expression is art if made for its own beauty, and entertainment if made for money. (This is the least rigid of his definitions. Crawford acknowledges that he often chooses a creative path over conventional business wisdom, which is why only one of his 13 games is a sequel.)
  2. A piece of entertainment is a plaything if it is interactive. Movies and books are cited as examples of non-interactive entertainment.
  3. If no goals are associated with a plaything, it is a toy . (Crawford notes that by his definition, (a) a toy can become a game element if the player makes up rules, and (b) The Sims and SimCity are toys, not games.) If it has goals, a plaything is a challenge .
  4. If a challenge has no “active agent against whom you compete,” it is a puzzle ; if there is one, it is a conflict . (Crawford admits that this is a subjective test. Video games with noticeably algorithmic artificial intelligence can be played as puzzles; these include the patterns used to evade ghosts in Pac-Man.)
  5. Finally, if the player can only outperform the opponent, but not attack them to interfere with their performance, the conflict is a competition . (Competitions include racing and figure skating.) However, if attacks are allowed, then the conflict qualifies as a game.

Crawford's definition may thus be rendered as: an interactive, goal-oriented activity, active agents to play against, in which players (including active agents) can interfere with each other.

Other definitions

  • "A game is a system in which players engage in an artificial conflict, defined by rules, that results in a quantifiable outcome." (Katie Salen and Eric Zimmerman)
  • "A game is a form of art in which participants, termed players , make decisions in order to manage resources through game tokens in the pursuit of a goal." (Greg Costikyan)
  • "A game is an activity among two or more independent decision-makers seeking to achieve their objectives in some limiting context. " (Clark C. Abt)
  • "At its most elementary level then we can define game as an exercise of voluntary control systems in which there is an opposition between forces, confined by a procedure and rules in order to produce a disequilibrial outcome." (Elliot Avedon and Brian Sutton-Smith)
  • "A game is a form of play with goals and structure." (Kevin Maroney)

Gameplay elements and classification

Games can be characterized by "what the player does." This is often referred to as gameplay. Major key elements identified in this context are tools and rules which define the overall context of game and which in turn produce skill, strategy, and chance.

Tools

Games are often classified by the components required to play them (e.g. miniatures, a ball, cards, a board and pieces, or a computer). In places where the use of leather is well established, the ball has been a popular game piece throughout recorded history, resulting in a worldwide popularity of ball games such as rugby, basketball, football, cricket, tennis, and volleyball. Other tools are more idiosyncratic to a certain region. Many countries in Europe, for instance, have unique standard decks of playing cards. Other games such as chess may be traced primarily through the development and evolution of its game pieces.

Many game tools are tokens, meant to represent other things. A token may be a pawn on a board, play money, or an intangible item such as a point scored.

Games such as hide-and-seek or tag do not utilise any obvious tool; rather, their interactivity is defined by the environment. Games with the same or similar rules may have different gameplay if the environment is altered. For example, hide-and-seek in a school building differs from the same game in a park; an auto race can be radically different depending on the track or street course, even with the same cars.

Rules

Whereas games are often characterized by their tools, they are often defined by their rules. While rules are subject to variations and changes, enough change in the rules usually results in a "new" game. For instance, baseball can be played with "real" baseballs or with wiffleballs. However, if the players decide to play with only three bases, they are arguably playing a different game.

Rules generally determine turn order, the rights and responsibilities of the players, and each player’s goals. Player rights may include when they may spend resources or move tokens. Common win conditions are being first to amass a certain quota of points or tokens (as in Settlers of Catan), having the greatest number of tokens at the end of the game (as in Monopoly), or some relationship of one’s game tokens to those of one’s opponent (as in chess's checkmate).

Skill, strategy, and chance

A game’s tools and rules will result in its requiring skill, strategy, luck, or a combination thereof, and are classified accordingly.

Games of skill include games of physical skill, such as wrestling, tug of war, hopscotch, target shooting, and stake, and games of mental skill such as checkers and chess. Games of strategy include checkers, chess, go, arimaa, and tic-tac-toe, and often require special equipment to play them. Games of chance include gambling games (blackjack, mah-jongg, roulette, etc.), as well as snakes and ladders and rock, paper, scissors; most require equipment such as cards or dice. However, most games contain two or all three of these elements. For example, American football and baseball involve both physical skill and strategy while tiddlywinks, poker, and Monopoly combine strategy and chance. Many card and board games combine all three; most trick-taking games involve mental skill, strategy, and an element of chance, as do many strategic board games such as Risk, Settlers of Catan, and Carcassonne.

Single-player games

Most games require multiple players. However, single-player games are unique in respect to the type of challenges a player faces. Unlike a game with multiple players competing with or against each other to reach the game's goal, a one-player game is a battle solely against an element of the environment (an artificial opponent), against one's own skills, against time, or against chance. Playing with a yo-yo or playing tennis against a wall is not generally recognized as playing a game due to the lack of any formidable opposition.

It is not valid to describe a computer game as single-player where the computer provides opposition. If the computer is merely record-keeping, then the game may be validly single-player.

Many games described as "single-player" may be termed actually puzzles or recreations.

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