Aperture Science Psychoacoustic Laboratories
Aperture Science Psychoacoustic Laboratories
Aperture Science Psychoacoustic Laboratories
Aperture Science Psychoacoustic Laboratories
Aperture Science Psychoacoustic Laboratories
Aperture Science Psychoacoustic Laboratories
Aperture Science Psychoacoustic Laboratories
Aperture Science Psychoacoustic Laboratories
Aperture Science Psychoacoustic Laboratories
Aperture Science Psychoacoustic Laboratories
Aperture Science Psychoacoustic Laboratories
Aperture Science Psychoacoustic Laboratories
Aperture Science Psychoacoustic Laboratories
Aperture Science Psychoacoustic Laboratories
Aperture Science Psychoacoustic Laboratories
Aperture Science Psychoacoustic Laboratories
Aperture Science Psychoacoustic Laboratories
Aperture Science Psychoacoustic Laboratories
Aperture Science Psychoacoustic Laboratories
Aperture Science Psychoacoustic Laboratories
Aperture Science Psychoacoustic Laboratories
Aperture Science Psychoacoustic Laboratories
The music that plays the second time Chell wakes up, and stops when Wheatley smashes through a wall leading to the old testing tracks.
Lyrics for this song have yet to be released
The Courtesy Call was written by Mike Morasky.
The Courtesy Call was produced by Valve & Aperture Science Psychoacoustic Laboratories.
Aperture Science Psychoacoustic Laboratories released The Courtesy Call on Wed May 25 2011.