Does Half-Life have an end? Do you guys have an idea of how you're going to wrap up this whole franchise?

Game Newell: Well, there's specific stories and character arcs or plot lines that we know terminate. We have this bible that covers a lot, and there's a lot of interesting stories to tell. Portal, for example, is bringing out stuff about Aperture Science way before we had originally thought we'd be telling stories set in the Half-Life universe. We'd certainly love to be working in other universes because any time you get two Valve people together they come up with five game ideas and thirteen universes that they would like to tell and play them in. So there's a lot of Half-Life left at Valve.