pokoko on 21 February 2013
People are getting a bit too excited over who isn't on that list. It doesn't mean those developers won't make a PS4 game EVER, just that they might not have one planned right now.
Also, it's possible that a few asked to not be included because they want to make a surprise announcement at another event.
As far as Valve goes, Basil is pretty much right. They don't make many new games, and when they do, they reveal them on their own terms. No one had a clue about Portal 2, for instance, until they ran that Potato ARG. Even if they were making a PS4 game right now, does anyone think they'd let it slip during a system announcement?
