Programming – What Stream do I go for.

Hi,
I have been working on web applications and windows applications for a while now. But I find this pretty boring .. I really want to get in some hard core programming which is more interesting and is more about making hard logics (I hope you get what I mean). In short i am planning to change my stream from a web developer to something different .. I have thought about Game Programming or Embedded programming .. but i would like to know what all are the possible streams that i could look into.

Thanks.
Navdeep