Interactive Narrative Part 2: The Artist and The User

This post is a continuation from the previous post, titled Story and Control.
Games, through the use of cut-scenes, dialogue, and musical scores, can still be very emotionally and intellectually compelling, such as the Metal Gear Solid series.  This requires a very skilled storyteller.  Yet the player is still, in general, being completely guided by the artist.
Now if we look back at film (and perhaps games, too), we notice that sometimes movies can have one or more “alternate endings” (some great examples of this are the Bioshock and Silent Hill game series, as well as the films Ice Harvest and Ronin).  This …