Gameplay is the specific way in which players interact with a game. The term applies to both video games and tabletop games. Gameplay is the connection between the player and the game, the player's overcoming of challenges, and the pattern of player behavior defined through the game's rules.
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In video games, a boss is a significantly powerful non-player character and computer-controlled enemy created as a major opponent to players. A fight with a boss character is referred to as a boss battle or boss fight. Bosses are generally far stronger than other opponents the players have faced up to that point in a game. Boss battles are generally seen at climax points of particular sections of games, such as at the end of a level or stage or guarding a specific objective. A miniboss is a boss weaker or less significant than the main boss in the same area or level, though usually more powerful than the standard opponents and often fought alongside them. A superboss (sometimes 'secret', 'hidden' or 'raid' boss) is generally much more powerful than the bosses encountered as part of the main game's plot and is often an optional encounter. A final boss is often the main antagonist of a game's story and the defeat of that character usually provides a conclusion to the game. A boss rush is a stage where players face multiple previous bosses again in succession.
For example, in a run 'n' gun video game, all regular enemies might use pistols while the boss uses a tank. A boss enemy is quite often larger in size than other enemies and the player character. At times, bosses are very hard to defeat without being adequately prepared and/or knowing the correct fighting approach. Bosses usually take strategy and special knowledge to defeat, such as how to attack weak points or avoid specific attacks.
In game theory, a cooperative or coalitional game is a game with groups of players who form binding "coalitions" with external enforcement of cooperative behavior (e.g. through contract law). This is different from non-cooperative games in which there is either no possibility to forge alliances or all agreements need to be self-enforcing (e.g. through credible threats).
Cooperative games are analysed by focusing on coalitions that can be formed, and the joint actions that groups can take and the resulting collective payoffs.
A non-player character (NPC) is a character in a game that is not controlled by a player. The term originated in traditional tabletop role-playing games where it applies to characters controlled by the gamemaster (or referee) rather than by another player. In video games, this usually means a computer-controlled character that has a predetermined set of behaviors that potentially will impact gameplay, but will not necessarily be the product of true artificial intelligence.
A gamer is someone who plays interactive games, either video games, tabletop role-playing games, skill-based card games, or any combination thereof, and who often plays for extended periods of time. Originally a hobby, gaming has evolved into a profession for some, with some gamers routinely competing in games for money, prizes, or awards. In some countries, such as the US, UK, and Australia, the term "gaming" can refer to legalized gambling, which can take both traditional and digital forms, such as through online gambling. There are many different gamer communities around the world. Since the advent of the Internet, many communities take the form of Internet forums or YouTube or Twitch virtual communities, as well as in-person social clubs. In 2021, there were an estimated 3.24 billion gamers across the globe.
A tour puzzle is a puzzle in which the player travels around a board (usually but not necessarily two-dimensional) using a token which represents a character. Maze puzzles are often of this type.
Sometimes the player has more than one token with which to travel. Sometimes certain objects have to be found or retrieved on the way. In the case of large hedge mazes, the player makes the trip themselves instead of a token.
Player versus player (PvP) is a type of multiplayer interactive conflict within a game between human players. This is often compared to player versus environment (PvE), in which the game itself controls its players' opponents and is usually offline, whereas PvP tends to be online. The terms are most often used in games where both activities exist, particularly MMORPGs, MUDs, and other role-playing video games, to distinguish between game modes. PvP can be broadly used to describe any game, or aspect of a game, where players compete against each other. PvP is often controversial when used in role-playing games. In most cases, there are vast differences in abilities between players. PvP can even encourage experienced players to immediately attack and kill inexperienced players. PvP is often referred to as player killing in the cases of games which contain, but do not focus on, such interaction.