由 seamuspotter 發表：There will NOT be a Portal 3!
由 Scale567 發表：I am afraid you are wrong my friend. how do you know?
由 Kiki 發表：The only thing they could do is sent Atlas and P-Body outside to harvest humans, if there are any humans left (50,000 years is a pretty long time), but the outside world is not portal compatible, and there's a reason why the game is called "Portal", so there goes that possibility as well.
由 Crixus of Gual 發表：Just like there will never be Counter-strike 2.
由 Naddalemur 發表：I don't know exactly what they're going to do, but I do know that GLaDOS, Wheatley, and Chell will reunite somehow. I'm pretty sure they'll find a way to put some Cave Johnson in there.