Craig's monologue from the 20090904 show where he talks about Madonna's new video single, How videogames mimic his life from the 80's, and Rockband versus American Idol.
He was talking about the first videogame though... and did you mean Tetris? But that'd be wrong as well. The first one was called "Bertie the Brain", and is a tic-tac-toe vs an AI.