An arcade game or coin-op game is a coin-operated entertainment machine typically installed in public businesses such as restaurants, bars and amusement arcades. Most arcade games are presented as primarily games of skill and include arcade video games, pinball machines, electro-mechanical games, redemption games or merchandisers. Broadly, arcade games are nearly always considered games of skill, with only some elements of games of chance. Games that are solely games of chance, like slot machines and pachinko, often are categorized legally as gambling devices and, due to restrictions, may not be made available to minors or without appropriate oversight in many jurisdictions. An arcade video game takes player input from its controls, processes it through electrical or computerized components, and displays output to an electronic monitor or similar display. All arcade video games are coin-operated or accept other means of payment, housed in an arcade cabinet, and located in amusement arcades alongside other kinds of arcade games. Until the early 2000s, arcade video games were the largest and most technologically advanced segment of the video game industry. Early prototypical entries Galaxy Game and Computer Space in 1971 established the principle operations for arcade games, and Atari's Pong in 1972 is recognized as the first successful commercial arcade video game. Improvements in computer technology and gameplay design led to a golden age of arcade video games, the exact dates of which are debated but range from the late 1970s to mid-1980s. This golden age includes Space Invaders, Pac-Man, and Donkey Kong. The arcade industry had a resurgence from the early 1990s to mid-2000s, including Street Fighter II, Mortal Kombat, and Dance Dance Revolution, but ultimately declined in the Western world as competing home video game consoles such as the Sony PlayStation and Microsoft Xbox increased in their graphics and gameplay capability and decreased in cost. Nevertheless, Japan, China, and South Korea retain a strong arcade industry in the present day.
When Kazuya Mishima is 5 years old, his father Heihachi Mishima carries him to the top of a mountain and callously throws him off a cliff to test his son's strength, whether he is fit to lead the Mishima Zaibatsu, the family business, and to see if he will be able to climb back up the same cliff. Kazuya survives the initial fall but left a large scar on his chest which causes a demonic entity within him called the Devil Gene to activate, offering Kazuya the opportunity to gain immense strength and power. Driven by his thirst for revenge, he climbs up the mountainside. To further motivate Kazuya, Heihachi adopts the Chinese orphan Lee Chaolan and raises him as a rival to his true son. Over the years, Kazuya travels around the world and competes in martial arts championships, becoming an undefeated champion, with the only blemish on his record being a draw against Paul Phoenix, an American martial artist who seeks to settle the score with him. 21 years later, Heihachi decides to test his son's strength and worth and announces the (King of) Iron Fist Tournament in which the two would meet in the finals. However, Heihachi is unexpectedly defeated by Kazuya, empowered by the strength given to him by the Devil Gene, in an intense father-son battle. In an act of revenge, Kazuya picks up his father's unconscious body and tosses him down the same cliff that he was thrown off as a child. Smiling to himself, Kazuya becomes the new owner of the Mishima Zaibatsu.
