A video game is an electronic game in which one or more people interact, through a controller, with a device equipped with video images. This electronic device, known generically as "platform", can be a computer, an arcade machine, a game console or a portable device (a mobile phone, for example).
The input device used to manipulate a video game is known as a video game controller and varies depending on the platform. For example, a controller could only consist of a button and a joystick, while another could have a dozen buttons and one or more gamepad (s). The first computer games used to use a keyboard to perform the interaction, or they required the user to purchase a joystick with a button at least. Many modern computer games allow or require the user to use a keyboard and a mouse simultaneously. Among the most typical controllers are gamepads, joysticks, keyboards, mice and touch screens.
Generally, video games make use of other ways, apart from the image, to provide interactivity and information to the player. The audio is almost universal, using sound reproduction devices such as speakers and headphones. Another type of feedback is made through haptic peripherals that produce vibration or force feedback, sometimes using vibration to simulate force feedback.