Download Portal 2: Songs to Test By (volume 1) for free

Portal 2 Album Cover

Move over Lady Gaga, here comes LaDY GLaDOS. While the latest Jonathan Coulton single will still cost you, Valve has posted 22 tracks - totaling more than an hour - of Portal 2's electro-trippy ambient soundtrack for free download , complete with album art and Android/iOS-formatted ringtones. Even if you're not a Portal fan, this is worth grabbing for tracks like Science is Fun and the hauntingly catchy Turret Wife Serenade.

Bonus: the fact that this is labeled "Volume 1" implies more free tunes will be coming sooner or later!