There are a trio of Stream First games already in development: Superfight, Wastelanders and Streamline. In Superfight players create superheroes by drawing cards from a deck, arguing whose character would win in a fight and then letting the audience decide the victor. Wastelanders is a bit different, in that it's a strategy game that has broadcasters and the audience playing together in battle against another streamer and his or her viewers. Lastly, Streamline pits streams against each other in arena games. Viewers can place bets on participants in the game and even vote for rule changes, to name a few bits of available interactivity.

You can bet that once Amazon's Lumberyard game engine and its native Twitch integration starts gaining more traction that these types of games will only continue to flourish.