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 is releasing in three volumes: The first, titled Volume 1, was released on May 25, 2011; Volume 2 was released on July 1, 2011 and Volume 3 is currently unreleased.
Volume 1
Science is Fun by Aperture Science Psychoacoustics Laboratory [2:33] | 
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Concentration Enhancing Menu Initialiser by Aperture Science Psychoacoustics Laboratory [2:33] | Download | Play
9999999 by Aperture Science Psychoacoustics Laboratory [3:11] | Download | Play
The Courtesy Call by Aperture Science Psychoacoustics Laboratory [3:37] | Download | Play
Technical Difficulties by Aperture Science Psychoacoustics Laboratory [3:21] | Download | Play
Overgrowth by Aperture Science Psychoacoustics Laboratory [2:50] | Download | Play
Ghost of Rattman by Aperture Science Psychoacoustics Laboratory [4:06] | Download | Play
Haunted Panels by Aperture Science Psychoacoustics Laboratory [1:36] | Download | Play
The Future Starts With You by Aperture Science Psychoacoustics Laboratory [3:21] | Download | Play
There She Is by Aperture Science Psychoacoustics Laboratory [4:20] | Download | Play
You Know Her? by Aperture Science Psychoacoustics Laboratory [3:10] | Download | Play
The Friendly Faith Plate by Aperture Science Psychoacoustics Laboratory [2:59] | Download | Play
15 Acres of Broken Glass by Aperture Science Psychoacoustics Laboratory [4:59] | Download | Play
Love as a Construct by Aperture Science Psychoacoustics Laboratory [4:57] | Download | Play
I Saw a Deer Today by Aperture Science Psychoacoustics Laboratory [3:13] | Download | Play
Hard Sunshine by Aperture Science Psychoacoustics Laboratory [2:48] | Download | Play
I'm Different by Aperture Science Psychoacoustics Laboratory [4:28] | Download | Play
Adrenal Vapor by Aperture Science Psychoacoustics Laboratory [2:36] | Download | Play
Turret Wife Serenade by Aperture Science Psychoacoustics Laboratory [1:38] | Download | Play
I Made It All Up by Aperture Science Psychoacoustics Laboratory [3:56] | Download | Play
Comedy = Tragedy + Time by Aperture Science Psychoacoustics Laboratory [3:29] | Download | Play
Triple Laser Phase by Aperture Science Psychoacoustics Laboratory [4:15] | Download | Play
Volume 2
You Will Be Perfect by Aperture Science Psychoacoustics Laboratory [2:39] | Download | Play
Halls Of Science 4 by Aperture Science Psychoacoustics Laboratory [4:35] | Download | Play
Bots Build Bots by Aperture Science Psychoacoustics Laboratory [4:07] | Download | Play
An Accent Beyond by Aperture Science Psychoacoustics Laboratory [2:58] | Download | Play
Robot Ghost Story by Aperture Science Psychoacoustics Laboratory [3:07] | Download | Play
Die Cut Laser Dance by Aperture Science Psychoacoustics Laboratory [2:01] | Download | Play
Turret Redemption Line by Aperture Science Psychoacoustics Laboratory [3:23] | Download | Play
Bring Your Daughter To Work Day by Aperture Science Psychoacoustics Laboratory [2:40] | Download | Play
Almost At Fifty Percent by Aperture Science Psychoacoustics Laboratory [1:59] | Download | Play
Don't Do It by Aperture Science Psychoacoustics Laboratory [5:16] | Download | Play
Template:Dictionary/audio/i am not a moron by Template:Dictionary/audio/i am not a moron [[[:Template:Dictionary/audio/i am not a moron]]:Template:Dictionary/audio/i am not a moron] | [[Media:Template:Dictionary/audio/i am not a moron|Download]] | [[Media:Template:Dictionary/audio/i am not a moron|Play]]
Vitrification Order by Aperture Science Psychoacoustics Laboratory [6:34] | Download | Play
Music of the Spheres by Aperture Science Psychoacoustics Laboratory [3:38] | Download | Play
You are Not Part Of the Control Group by Aperture Science Psychoacoustics Laboratory [3:24] | Download | Play
Forwarding the Cause of Science by Aperture Science Psychoacoustics Laboratory [3:40] | Download | Play
PotatOS Lament by Aperture Science Psychoacoustics Laboratory [1:59] | Download | Play
The Reunion by Aperture Science Psychoacoustics Laboratory [3:45] | Download | Play
Music of the Spheres 2 (Incendiary Lemons) by Aperture Science Psychoacoustics Laboratory [2:43] | Download | Play
Others
1. Exile Vilify - 4:46 by The National
2. Want You Gone - 2:22
Ringtones
Volume 1
Turret Wife Serenade [0:19] | Download: mp3 | m4a | m4r | Play
Science Is Fun [0:18] | Download: mp3 | m4a | m4r | Play
The Friendly Faith Plate [0:16] | Download: mp3 | m4a | m4r | Play
The Courtesy Call [0:16] | Download: mp3 | m4a | m4r | Play
I Saw a Deer Today [0:29] | Download: mp3 | m4a | m4r | Play
Comedy Equals Tragedy Plus Time [0:29] | Download: mp3 | m4a | m4r | Play
Volume 2
Music
Halls of Science [0:14] | Download: mp3 | m4a | m4r | Play
Music of the Spheres [0:19] | Download: mp3 | m4a | m4r | Play
You Are Not Part Of The Control Group [0:18] | Download: mp3 | m4a | m4r | Play
PotatOS Lament [0:15] | Download: mp3 | m4a | m4r | Play
You Will Be Perfect [0:13] | Download: mp3 | m4a | m4r | Play
Bring Your Daughter To Work Day [0:15] | Download: mp3 | m4a | m4r | Play
Sound Effects
Button Positive [0:01] | Download: mp3 | m4a | m4r | Play
Button Negative [0:01] | Download: mp3 | m4a | m4r | Play
Door Open [0:01] | Download: mp3 | m4a | m4r | Play
Door Close [0:01] | Download: mp3 | m4a | m4r | Play
Shoot Blue Portal [0:01] | Download: mp3 | m4a | m4r | Play
Shoot Orange Portal [0:01] | Download: mp3 | m4a | m4r | Play
Blue Paint [0:02] | Download: mp3 | m4a | m4r | Play
Turret Machine Gun [0:01] | Download: mp3 | m4a | m4r | Play
See also
References