"Heavy Rain is a game about choices and the consequences to those choices. Quantic Dream's demo of the upcoming adventure title tries to demonstrate just how the developer plans on pulling that off. You get a brief glimpse at how the controls, dynamic conversation, and investigation aspect will work.
As the player, you'll immediately notice in the first scene that the controls are atypical to other contemporary games: every move is deliberate and can even require multiple buttons be pressed at the same time. For example, the game goes so far as to make you hold R2 to simply walk. You can imagine how the rest of the controls hold up...."