I know I'm going to sound like a huge fanboy, but I just loved Portal 2 to death. I was really hoping for an official soundtrack since the first Portal only had a few songs released as part of the Orange Box soundtrack. I had already downloaded an unofficial one extracted from the game but it was far from perfect seeing as many songs include dynamic elements related to your activity in the various test chambers and those were missing. Plus, some songs only exist in the game files in their final form (mixed with voices and sound effects for some sequences, or sounding like a low-quality radio broadcast, etc). This has finally been corrected!
I give you
Portal 2: Songs to Test By, free and fully official
![Smiley :)](https://www.vgmaps.com/forums/Smileys/default/smiley.gif)
. From what I can tell, it covers the first part of the game and if you've finished it, you know approximately how much it covers (avoiding spoilers for now).
Apparently, there will be two more volumes and I can't wait for them even if they end up not being free!