In an interview with the Steamcast podcast, Gabe Newell only has a little bit to say: “Right now, the Half-Life 2 episodes themselves are on a third sort of rhythm, and, you know, we think it makes sense for the product and for what we’re trying to do there. The reason that we’re not talking about anything is mainly that we don’t have anything to say; it’s not like we decided we released too much information, it’s just that if we had information that we were in a position to deliver to people, we would—and right now we don’t have anything to say about it.” … “So, Ep 3 is sort of victim to our willingness to experiment, and as soon as we have stuff that we’re ready to say about Ep 3, we will.”
Source:
Steamcast Podcast