Portal 2's egg-shaped turrets get their own easter egg

Think you've seen all there is to see in the deadly, paneled catacombs of Aperture Science? You might have missed this Portal 2 easter egg: A quartet of hidden-away, musically-oriented turrets, a video of which is posted after the jump. Or maybe you didn't miss it. We're not mind readers, you know.

This article was originally published on Joystiq.