Wow, I didn't know about this side of the view on video game. It's fascinating how deeper it actually is. This post sounds like it's from a book that teach you about crafting storyline for games (is it? Or it's based on experience? It's a really good read either way).
Though there are some things/terms that I'm not sure if I fully understand (because of my lacking English I persume), I bookmarked this post in case I need some guide/tips, if you don't mind.
RE: Proactive, Active, and Reactive Events in Game Storytelling