Detecting input not by the pressing of buttons or manipulation of a device, but directly from the movements of the player.
A form of input that relies on physical movement instead of the conventional command input.
Motion control deals with when the motion itself is what is responsible for the input. Examples include using gyroscopic sensors to detect tilting as well as infrared detection and motion capture to detect actual movement. Often, the motion is designed to mimic what the player is intending to accomplish in the game, creating a more direct relation between the actions of the player and the events in the game.
Questions that deal with this kind of input technology fall under the purview of this tag.