It's called "Ninja Reflex
" using the new "steamworks" multiplayer stuff they released for developers to use for free recently. It's only $9 on Steam. "Master the Art of Speed and become a Ninja Gamer! Ninja Reflex uses martial arts challenges to test your reflexes, sharpen your hand-eye coordination, and measure your reaction times to the millisecond. Wield throwing stars, katanas, nunchucks…even chopsticks! Progress from White Belt all the way to Black Belt, 3rd Degree, and see if you can complete the 50+ Steam achievements on your journey!"
It's also available for the Wii (for $40) and DS ($30). It may actually be better on the Wii simply because of the controller (especially for multiplayer). But it's still cool to see that the PC isn't left out in the cold. Since the wiimote can be hooked up to the PC it's version should be made compatible with it too. It may also work good with the Mouse too but I would like to try it out before I say so. There's a demo out.. *Contemplates heading to my PC and getting on Steam*.
The system requirements are pretty low for a new game.. I guess because it pretty much is a Wii port. It only requires a 1GHz CPU, 256MB of RAM, and a DX9 card (doesnt specify which).