Boxing is the most popular type of contact sport, classified as a combat sport. Two fighters must strike each other only with their fists. A match lasts from 3 to 12 rounds and is controlled by a referee. In video games, boxing is available in two variations: simulation and arcade. Both types almost always release only on consoles, as creating comfortable controls on a keyboard is not feasible. Recently, arcade boxing has been released for consoles with interactive controls: Nintendo Wii U, Xbox 360 + Kinect, Xbox One, PS3, and PS4 + PS Move. Simulators are full of realism and difficult to master, although the entry threshold is quite low. This means that to play at a high level will require a long time, but for conducting simple matches, just 5 minutes with a gamepad in hand is sufficient.