A video game console is an interactive entertainment computer or customized computer system that produces a video display signal which can be used with a display device (a television, monitor, etc.) to display a video game. The term "video game console" is used to distinguish a machine designed for people to buy and use primarily for playing video games on a TV. As of 2007, it is estimated that video game consoles have made up 75% of the world's gaming market.

Although the first computer games appeared in the 1950s, they were based around vector displays, not analog video. It was not until 1972 that Magnavox released the first home video game console which could be connected to a TV set—the Magnavox Odyssey, invented by Ralph H. Baer. The Odyssey was initially only moderately successful, and it was not until Atari's arcade game Pong popularized video games, that the public began to take more notice of the emerging industry. By the autumn of 1975 Magnavox, bowing to the popularity of Pong, cancelled the Odyssey and released a scaled down version that only played Pong and hockey, the Odyssey 100. A second, "higher end" console, the Odyssey 200, was released with the 100 and added onscreen scoring, up to four players, and a third game—Smash. Almost simultaneously released with Atari's own home Pong console through Sears, these consoles jump-started the consumer market. As with the arcade market, the home market was soon flooded by dedicated consoles that played simple pong and pong-derived games.

A video game is an electronic game that involves human interaction with a user interface to generate visual feedback on a video device. The word video in video game traditionally referred to a raster display device, but following popularization of the term "video game", it now implies any type of display device. The electronic systems used to play video games are known as platforms; examples of these are personal computers and video game consoles. These platforms range from large mainframe computers to small handheld devices. Specialized video games such as arcade games, while previously common, have gradually declined in use. Video games have gone on to become an art form and industry.

The input device used to manipulate video games is called a game controller, and varies across platforms. For example, a controller might consist of only a button and a joystick, while another may feature a dozen buttons and one or more joysticks. Early personal computer games often needed a keyboard for gameplay, or more commonly, required the user to buy a separate joystick with at least one button. Many modern computer games allow or require the player to use a keyboard and a mouse simultaneously. A few of the most common game controllers are gamepads, mice, keyboards, and joysticks.