From Telltale Games the guys who did the recent Sam and Max and Monkey Island episodes are doing a Back to the Future game in the same manner by releasing 5 episodes. Right now they are offering the first episode for free. Go to the link below to begin.
This works great for Sam and Max and Monkey Island but I really hate this American cartoonish style for other things, like Back to the Future. It's too bad it's this way (for myself).