Stories are linear. As in, no choices at all. Storygames are a combination of the two (eg. Mattias, Light Space, nearly every game on the site), and then there are just plain games (like your Siege, Anubis). Every storygame on here has some game aspect in it, even the ones with only one possible path to win.
We dont need to go any further with this... (Moved to Parlor Room)