Anyone who’s played Portal 2 can tell you that the only thing that’s wrong with it is that it ends. You don’t build a digital game empire, however, without a bit of foresight, so Valve have you completely covered. The planned “Peer Review” DLC will only continue the co-op portion of the story, featuring P-Body and Atlas, Chell’s *ahem* replacements.
“You and a friend will continue the story of loyal bots P-Body and Atlas as you puzzle your way through a mysterious new co-op test track and once again match wits with GLaDOS,” according to Valve. The update, much like the original Portal about a week ago, is being offered for free. We know anything Portal is so good that you get the urge to pay for it even when it’s free, but you’ll just have to roll with the punches on this one.