An example game controller includes a spherical housing, a joystick, an operation button, a vibrator, and an antenna. The housing includes a first hemispherical portion and a second hemispherical portion. The joystick is on a boundary between the first hemispherical portion and the second hemispherical portion. The vibrator is inside the second hemispherical portion and configured to generate a vibration to vibrate the housing. The antenna is inside the first hemispherical portion, the antenna configured to transmit, to outside, information regarding an operation on the joystick and information regarding an operation of the operation button.