portal

Portal 2 OST (Raw Versions)

Portal2 Companion Cube

Portal 2 - GLaDOS Awakes

You can download the whole albums here: http://www.thinkwithportals.com/music.php 
Otherwise, you can just download the singular track straight from here.

Portal 2 Soundtrack - Halls Of Science 4

One of the many tracks from the Portal 2 OST, Created by Valve

Portal 2 OST - PotatOS Lament [Extended]

Portal 2 OST - Reconstructing More Science

Chapter 5 - The Escape - Neurotoxin 3

Chapter 1 - The Courtesy Call - Intro 4 - Apple

Chapter 1 - The Courtesy Call - Intro 3

Chapter 1 - The Courtesy Call - Intro 1

Main Menu 4

Main Menu 2

Chapter 5 - The Escape - Neurotoxin 3

My Boi on a Sticc