It ' ll be David Duke . <| sep |> I think it depends on if they drop more hints or not . Their deletion could just as easily be them realizing the joke was really esoteric and would be confusing to most users , or that whoever made the Tweet was unaware of the Ricochet 2 euphemism , and then someone who did charged upstairs and was like Dude , you gotta remove that Tweet . In an interview with Gamasutra , Adam Foster Minerva , Portal ARG once said I feel the most important aspect of a puzzle in an ARG is that a correct solution must be obviously correctIn other words , if Valve is running an ARG , you will know they are running one . It ' s not going to be users finding an obscure arrangement of pixels in the corner of a random graphic . They will produce concrete , indisputable information to start things off . The fact that there ' s some reasonable doubt about this Tweet ' s intentions is why they ' d have to follow it up if there really is something .