The Stanley Parable is an interesting game. Branching possibilities based upon actions taken (sometimes, those taken in a previous run no less) is a lofty goal to strive for. If, no when, I successfully complete a project, cause and effect will be a large aspect of what I produce.
So I'm resuming work on the Shadowstar Trilogy. I've decided that it will take place between the end of G4 and the start of G5, and two of the Lost Rulers will be Twilight Sparkle and Sunset Shimmer (who is the moon princess in my AU).