Here's something a little bit different: Cloud Chamber is a video series that you watch in segments, before jumping into forum areas to discuss what's going on and what your theories are. If people like your ideas, they'll upvote you, and the more upvotes you get, the more score you receive.

It's the closest I've seen to turning a TV series into a video game. The show is presented as a series of nodes on a landscape, and you click through them to advance the story and receive more information. It's pretty hard to talk about the actual story itself without spoiling it massively, so you might want to watch the above video before taking a punt on it, to make sure it's the sort of thing you'll be into. You can find Cloud Chamber on Steam.