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, and a 4-disk Collectors Edition is available to purchase from Amazon.
Shorter versions of particular songs, or sound effects from the game, are available as ringtones from the website above. The soundtrack was released in three volumes: The first, titled Volume 1, was released on May 25, 2011; Volume 2 on July 1, 2011, Volume 3 on Sept. 30, 2011, and as a 4-disk Collectors Edition on October 30, 2012.
The Collectors Edition also includes in-game promotional items for Team Fortress 2, and to & in-game promotional items for Dota 2, and the Turret Lullaby comic.
Portal 2: Songs to Test By - Volume 1 (Collectors Edition Disk #1)
Album: Portal 2: Songs to Test By - Volume 1 by Aperture Science Psychoacoustics Laboratory
- Science is Fun by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By [2:33] | Download | Play
- Concentration Enhancing Menu Initialiser by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By [2:33] | Download | Play
- 9999999 by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By [3:11] | Download | Play
- The Courtesy Call by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By [3:37] | Download | Play
- Technical Difficulties by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By [3:21] | Download | Play
- Overgrowth by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By [2:50] | Download | Play
- Ghost of Rattman by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By [4:06] | Download | Play
- Haunted Panels by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By [1:36] | Download | Play
- The Future Starts With You by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By [3:21] | Download | Play
- There She Is by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By [4:20] | Download | Play
- You Know Her? by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By [3:10] | Download | Play
- The Friendly Faith Plate by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By [2:59] | Download | Play
- 15 Acres of Broken Glass by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By [4:59] | Download | Play
- Love as a Construct by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By [4:57] | Download | Play
- I Saw a Deer Today by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By [3:13] | Download | Play
- Hard Sunshine by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By [2:48] | Download | Play
- I'm Different by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By [4:28] | Download | Play
- Adrenal Vapor by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By [2:36] | Download | Play
- Turret Wife Serenade by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By [1:38] | Download | Play
- I Made It All Up by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By [3:56] | Download | Play
- Comedy = Tragedy + Time by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By [3:29] | Download | Play
- Triple Laser Phase by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By [4:15] | Download | Play
Portal 2: Songs to Test By - Volume 2 (Collectors Edition Disk #2)
Album: Portal 2: Songs to Test By - Volume 2 by Aperture Science Psychoacoustics Laboratory
- You Will Be Perfect by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 2 [2:39] | Download | Play
- Halls Of Science 4 by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 2 [4:35] | Download | Play
- Bots Build Bots by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 2 [4:07] | Download | Play
- An Accent Beyond by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 2 [2:58] | Download | Play
- Robot Ghost Story by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 2 [3:07] | Download | Play
- Die Cut Laser Dance by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 2 [2:01] | Download | Play
- Turret Redemption Line by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 2 [3:23] | Download | Play
- Bring Your Daughter To Work Day by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 2 [2:40] | Download | Play
- Almost At Fifty Percent by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 2 [1:59] | Download | Play
- Don't Do It by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 2 [5:16] | Download | Play
- Template:Dictionary/audio/i am not a moron by Template:Dictionary/audio/i am not a moron on 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 on Portal 2: Songs to Test By - Volume 2 [6:34] | Download | Play
- Music of the Spheres by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 2 [3:38] | Download | Play
- You are Not Part Of the Control Group by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 2 [3:24] | Download | Play
- Forwarding the Cause of Science by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 2 [3:40] | Download | Play
- PotatOS Lament by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 2 [1:59] | Download | Play
- The Reunion by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 2 [3:45] | Download | Play
- Music of the Spheres 2 (Incendiary Lemons) by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 2 [2:43] | Download | Play
Portal 2: Songs to Test By - Volume 3 (Collectors Edition Disk #3)
Album: Portal 2: Songs to Test By - Volume 3 by Aperture Science Psychoacoustics Laboratory
- Reconstructing More Science by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 3 [2:36] | Download | Play
- Wheatley Science by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 3 [2:29] | Download | Play
- Franken Turrets by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 3 [4:08] | Download | Play
- Machiavellian Bach by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 3 [4:01] | Download | Play
- Excursion Funnel by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 3 [4:32] | Download | Play
- TEST by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 3 [6:14] | Download | Play
- The Part Where He Kills You by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 3 [3:23] | Download | Play
- Omg, What has He Done? by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 3 [2:24] | Download | Play
- Bombs for Throwing at You by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 3 [5:48] | Download | Play
- Your Precious Moon by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 3 [1:55] | Download | Play
- Caroline Deleted by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 3 [1:50] | Download | Play
- Cara Mia Addio! by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 3 [2:33] | Download | Play
- Want You Gone by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 3 [2:21] | Download | Play
- Spaaaaace by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 3 [0:45] | Download | Play
- Space Phase by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 3 [1:32] | Download | Play
- Some Assembly Required by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 3 [1:50] | Download | Play
- Robot Waiting Room #1 by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 3 [2:14] | Download | Play
- Robot Waiting Room #2 by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 3 [2:14] | Download | Play
- Robot Waiting Room #3 by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 3 [2:14] | Download | Play
- Robot Waiting Room #4 by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 3 [2:14] | Download | Play
- Robot Waiting Room #5 by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 3 [2:14] | Download | Play
- Robot Waiting Room #6 by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 3 [2:06] | Download | Play
- You Saved Science by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 3 [0:47] | Download | Play
- Robots FTW by Aperture Science Psychoacoustics Laboratory on Portal 2: Songs to Test By - Volume 3 [3:38] | Download | Play
Collectors Edition Disk #4
There are no downloads because it's a copyrighted disk.
Album: Portal 2: Songs to Test By by Aperture Science Psychoacoustics Laboratories
- Subject Name Here by Valve Studio Orchestra on The Orange Box Original Soundtrack [1:44]
- Taste Of Blood by Valve Studio Orchestra on The Orange Box Original Soundtrack [3:06]
- Android Hell by Valve Studio Orchestra on The Orange Box Original Soundtrack [3:45]
- Self Esteem Fund by Valve Studio Orchestra on The Orange Box Original Soundtrack [3:30]
- Procedural Jiggle Bone by Valve Studio Orchestra on The Orange Box Original Soundtrack [4:34]
- No Cake For You by Valve Studio Orchestra on The Orange Box Original Soundtrack [4:05]
- 4000 Degrees Kelvin by Valve Studio Orchestra on The Orange Box Original Soundtrack [1:01]
- Stop What You Are Doing by Valve Studio Orchestra on The Orange Box Original Soundtrack [4:00]
- Party Escort by Valve Studio Orchestra on The Orange Box Original Soundtrack [4:21]
- You're Not A Good Person by Valve Studio Orchestra on The Orange Box Original Soundtrack [1:24]
- You Can't Escape, You Know by Valve Studio Orchestra on The Orange Box Original Soundtrack [6:24]
- Still Alive by Jonathon Coulton on The Orange Box Original Soundtrack [2:56]
- Still Alive (J.C. Mix) by Aperture Science Psychoacoustics Laboratories on Portal 2: Songs to Test By - Volume 4 [2:57]
Others
1. Exile Vilify - 4:46 by The National
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
Volume 3
- Reconstructing More Science [0:08] | Download: mp3 | m4a | m4r | Play
- Your Precious Moon [0:10] | Download: mp3 | m4a | m4r | Play
- Cara Mia Addio [0:09] | Download: mp3 | m4a | m4r | Play
- Want You Gone [0:09] | Download: mp3 | m4a | m4r | Play
- Some Assembly Required [0:06] | Download: mp3 | m4a | m4r | Play
- Robots FTW [0:09] | Download: mp3 | m4a | m4r | Play
Trivia
Please note that the Trivia section consists purely or mainly of recurring melodies. This section also may be considered as a spoiler for people who would like to listen to the OST themselves.
- Adrenal Vapor, You Are Not Part of The Control Group, Forwarding The Cause of Science, Robot Waiting Room #6 have a very similar execution and contain a pure sinewave foundation.
- The second part of 9999999 is actually a remix of Music of the Spheres I.
- The track The Courtesy Call has its first part unique to itself, the second part is a sped-up version of Music of the Spheres I and the last part is a slowed-down version of Reconstructing More Science
- Likely made to reflect on the entire game before, Caroline Deleted contains a snippet from The Courtesy Call at the very beginning, a few lines from Cara Mia Addio! right after that as well as a few looping notes from Music of the Spheres I both as deep and slow and as high-pitched and fast. The song then changes to a remix of Reconstructing More Science, ending on the buzzing noises from Don't Do It.
- Similarly, I'm Different contains a few tones from Bombs For Throwing at You. They are however hard to recognize, as an extra tone with a different frequency is added right after an original one - only the quiet melody connects it with the other track.
- Tracks playing in the underground test chambers (You Are Not Part of The Control Group, Robot Waiting Room #1, Forwarding The Cause of Science and The Reunion) are all actually edited versions of the last one, becoming more corrupt with computer errors as time progresses and more of Aperture's story is revealed.