A video game is an electronic game in which one or more people interact by means of a controller, with a device that displays video images. This electronic device, known generically as a platform, can be a computer, an arcade machine, a game console or a portable device, such as a mobile phone, smartphone or tablet.

A mobile game is a game played on a mobile phone (feature phone or smartphone), tablet, smartwatch, PDA, portable media player or graphing calculator. The earliest known game on a mobile phone was a Tetris variant on the Hagenuk MT-2000 device from 1994.