An additional level of Half-Life 2: Lost Coast was available for download shortly after release. This level incorporates floating speech bubbles (known as commentary nodes) in the game world. Interacting with these nodes plays an audio commentary in which the developers discuss the creation of that area. The 2007 Orange Box version contains over two and a half hours of commentary activated in this way.

GWR Video Gamer’s Edition 2008, title: First PC game to feature developer commentary.