Methods and apparatus to meter video game play

A tangible machine readable storage medium comprising instructions that, when executed, cause a machine to at least:

• detect media identifying information corresponding to media presented in an environment including a video game system capable of executing a plurality of video games;
• identify which of the plurality of video games is being played via a video game controller based on the media identifying information, wherein the video game controller is coupled to a sensor to detect motion data related to movement of the video game controller and to transmit the motion data without affecting operation of the video game system;
• and
• combine the media identifying information with the motion data received from the sensor.

An apparatus comprising:

• a sensor structured to be attached to a video game controller, the sensor structured to be attached external to a housing of the video game controller, the sensor structured to detect a user interaction with the video game controller;
• a processor structured to execute instructions to:
• compare a magnitude of a motion of the video game controller detected by the sensor to a threshold;
• and
• attribute the motion to video game play if the magnitude of the motion detected by the sensor exceeds the threshold;
• and
• a transmitter structured to convey a signal representative of the detected user interaction to a meter without affecting operation of a video game system to be controlled by the video game controller.