You can make heavy use of a storyline if use wish using various methods - so can can have a game lean towards RPG.
You can call upon various means of displaying traditional in game screens/imaging/messaging including audio and video although the included feature story zone is currently broken it is apparently going to be fixed.
A search around these forums should return much information including info about conversations with characters which will require scripting - some of which are available at the forums.
"I am and forever will be your friend"