Multitap

A multitap is a video game console peripheral that increases the number of controller ports available to the player, allowing additional controllers to be used in play. A multitap often takes the form of a box with three or more controller ports which is then connected to a spare port on the console itself.

Mainly sports games have supported multitaps due to the multiplayer aspect of some sport games, though some role-playing video games and first person shooters have taken advantage of multitap support.