New rig development

Hello, I am trying to make a really realistic game with realistic graphics and all. I just came up with the idea of a new rig development. A rig thats human like and also has animatable finger, can anyone guide me with a set of instructions?

This link has some information on creating a realistic character as well as realistic accessories for it. Might not be exactly what you are looking for but it should take you a step in the right direction.