Another gaming example, associated with the WoD but fan-made, would be Genius: The Transgression.
And Autochthon of Exalted has qualities of a mad-scientist's invention, a mad scientist and could be argued to be the god of mad scientists in that universe:
"I was once known by many names. Maker, Creator, Madman, Thinker, Smelter, Blacksmith, and Perverse Inventor. But please, even if I no longer am, you may call by the name I once was. I am Autochthon." (I particularly like Gregg Landsman's take on the Perverse Inventor in Mass Effect: Glorious Shotgun Princess)