Portal 2: Songs To Test By (Collector's Edition) due next month

Valve has announced a spruced up Collector's Edition of Portal 2's soundtrack, Songs to Test By, due on 30th October.

A free digital three-volume soundtrack was released shortly after Portal 2's launch last April, but the Collector's Edition has an all-new fourth CD with 13 tracks on it from the original Portal that will be available for the first time.

The Collector's Edition also comes with an exclusive mini-comic entitled Turret Lullaby, which can be read online here.

Portal 2's soundtrack won several award including the Outstanding Achievement in Original Music Composition at the Interactive Achievement Awards and Best Audio from the 2012 Game Developers Choice Awards.

The full track list for Portal 2: Songs To Test By (Collector's Edition) is as follows:

Volume/Disc #1:

1. Science is Fun
2. Concentration Enhancing Menu Initialiser
3. 9999999
4. The Courtesy Call
5. Technical Difficulties
6. Overgrowth
7. Ghost of Rattman
8. Haunted Panels
9. The Future Starts With You
10. There She Is
11. You Know Her?
12. The Friendly Faith Plate
13. 15 Acres of Broken Glass
14. Love as a Construct
15. I Saw a Deer Today
16. Hard Sunshine
17. I'm Different
18. Adrenal Vapor
19. Turret Wife Serenade
20. I Made It All Up
21. Comedy = Tragedy + Time
22. Triple Laser Phase

Volume/Disc #2:

1. You Will Be Perfect
2. Halls of Science 4
3. (defun botsbuildbots () botsbuildbots ))
4. An Accent Beyond
5. Robot Ghost Story
6. Die Cut Laser Dance
7. Turret Redemption Line
8. Bring Your Daughter To Work Day
9. Almost At Fifty Percent
10. Don't Do It
11. I AM NOT A MORON!
12. Vitrification Order
13. Music of the Spheres
14. You are Not Part of the Control Group
15. Forwarding the Cause of Science
16. PotatOS Lament
17. The Reunion
18. Music of the Spheres 2 (Incendiary Lemons)

Volume/Disc #3:

1. Reconstructing More Science
2. Wheatley Science
3. FrankenTurrets
4. Machiavellian Bach
5. Excursion Funnel
6. TEST
7. The Part Where He Kills You
8. Omg, What has He Done?
9. Bombs for Throwing at You
10. Your Precious Moon
11. Caroline Deleted
12. Cara Mia Addio
13. Want You Gone
14. Spaaaaace
15. Space Phase
16. Some Assembly Required
17. Robot Waiting Room #1
18. Robot Waiting Room #2
19. Robot Waiting Room #3
20. Robot Waiting Room #4
21. Robot Waiting Room #5
22. Robot Waiting Room #6
23. You Saved Science
24. Robots FTW

Volume/Disc #4:

1. Subject Name Here
2. Taste of Blood
3. Android Hell
4. Self Esteem Fund
5. Procedural Jiggle Bone
6. No Cake For You
7. 4000 Degrees Kelvin
8. Stop What You Are Doing
9. Party Escort
10. You're Not a Good Person
11. You Can't Escape You Know
12. Still Alive
13. Still Alive (J.C. Mix)