Portal 2, in true Portal form, gave gamers a few songs to become obsessed with, like Cara Mia aka Turret Opera. A group of signers from A Cappella Records has teamed up with Aperture Science to make some beautiful music.
"To celebrate, a few members of our team invoked the concept of songs solely created by the human voice. And various robotic enhancements. The video involves a cappella music. It is designed to see how test subjects react to a cappella music."
Is this your favorite Portal song? I think mine is still "Still Alive."