At long last, the ratio is prosperous – IGN has posted up the full Portal 2 post-mortem talk: “Creating a Sequel to a Game That Doesn’t Need One“, presented at GDC 2012 by Valve writers (formerly Old Man Murray writers as well) Chet Faliszek, and Erik Wolpaw. While the cameraman wasn’t doing his job very well (he forgets he’s supposed to point the camera at the screen a couple times), it contains the full presentation. Check it out after the jump.