Mirrors Edge by Electronic Arts was released for PC on January 13th 2009 and is the first game with fully integrated PhysX designed to run on Nvidia GPU's. Some time back Nvidia purchased Ageia which invented PhysX and a Physics Processing Unit that can perform PhysX processing much faster than a CPU. With the acquisition of Ageia Nvidia push the technology to the forefront of graphics processing. Previously PhysX was a phenomenon and you purchased a separate PhysX card which just kind of hung around in your machine and didn't do much for you. Ageia just didn't have the Corporate resources to mainstream PhysX even though it's a great idea for effects in games that provide a more realistic user intractable environment.