Released in May 1982, Gottlieb Caveman was the first ever pinball machine-video game hybrid. The Caveman playfield contains a monitor that players use the joystick that is built into the machine's lockbar to play at points in the game. While it is a cool game, it never really caught on in arcades. Gottlieb only ended up producing 1,800 Caveman machines.
Below are a couple of pictures that I took of a Caveman that I saw in the wild while I was on a trip to arcades in Pennsylvania. Below that are the game's original flyer courtesy of the awesome IPDB website.