Portal 2 soundtrack

Songs to Test By is the soundtrack for Portal 2. Songs to Test By was made available free from the Portal 2 official website in .mp3 format. Shorter versions of particular songs, or sound effects from the game, are available as ringtones. The soundtrack was released in three volumes: The first, titled Volume 1, was released on May 25, 2011; Volume 2 on July 1, 2011 and Volume 3 on Sept. 30, 2011.

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1. Exile Vilify - 4:46 by The National