Virtua Cop is a classic of the Genre. If you were getting into light gun games at the same time as me, you would have played this in the arcades and then on the Sega consoles of the day.
Its since been released on almost every platform which makes it nice and easy to play.
My favorite version is the Virtua Cop elite edition which includes Virtua Cop 1 and 2 on one disc.
You can see it in action on pcsx2 in the elite edition here.
The main systems that you could play this on are: