A device used to provide input to a computer or video game. Normally this refers to a controller that is separate from the main machine, connected by wire or wirelessly, as opposed to the controls built into a handheld portable game machine such as Game Boy or Nintendo DS. Examples of game controllers may include gamepad, joystick (which should really not be confused with gamepad), arcade stick, flightstick, steering wheel, lightgun and more recently the Microsoft Kinect for Xbox 360.
See Wikipedia definition for more details.
This tag implicates controller (learn more).
The following tags implicate this tag: wii_remote, gamepad, and arcade_stick (learn more).