Gotta ask: what IS gyroscope

[Brian]

I hear this talk about a gun range game that uses this feature, but what exactly IS it? What does gyroscope do? Do I have to get this game to experience it?

 

[DannyBoy]

Yes, so far as I know it's the only game that uses the gyro.

http://www.mobilewhack.com/eliminate-gun-range-takes-full-advantage-of-the-iphone-4-gyroscope/