For those of you out born in the '80s or later with no idea what Tempest is, the game was Atari's first attempt at using vector-based wireframe models to simulate 3D action. The game's controls consisted of two fire buttons (a regular blaster and the ultra-powerful "Super Zapper") and a dial used in place of a joystick. Players control a ship at one end of a playfield, while enemies come down in a steady stream from the other end. Using the dial, players rotate along the edge of the playfield (or "around" it, if it's something like a tunnel; each playfield is a different shape) and shoot the enemies before they make their way through. Think Space Invaders, but with depth.