An example information processing system includes a computer device comprising a housing, a display on a front surface of the housing, and processing circuitry configured to generate images; and first and second controllers each configured for detachable attachment to first and second different side surfaces of the housing of the computer device. The computer device is configured to receive signals from the first and second controllers both when the first and second controllers are attached to the computer device and when the first and second controllers are detached from the computer device.