Marble Madness was a novel game for its time, introducing the Atari System 1 hardware and featuring unique level designs and gameplay in addition to true stereo sound. Players roll a marble (using a trackball, perhaps the tightest connection between gameplay and control scheme ever conceived) through increasingly complex and perilous 3D landscapes, trying to get to the goal before the timer runs out. The game was a hit upon its release, and is probably the most memorable of the System 1 games. Though it works best with a trackball, it is playable with an 8-way joystick, albeit with somewhat less control, and you'll feel like you're missing the point (i.e. marbles). Check out the rest of the Atari System 1 games on the theme pack page.