I do apologize, This post was a joking
You probably want to use Unity.
For motion capture, Poser Pro Game Dev can do it with a kinect and imports into Unity.
Develop games in your browser. Powerful, performant & highly capable.
I agree with ArcadEd, Unity would be a better choice.
First though I would go hold my head under the water in a bathtub for 5 minutes.