The quintessential classic. Atari needed something to show off the prowess of their new 8-bit systems, and this was the game that did it. Written by the Atari hardware engineer who also designed the POKEY chip, it included redefined characters sets, multiple display lists with horizontal interrupts, player-missile graphics, creative sounds; you name it. We had the ROM cartridge before we had the joysticks... ever try playing with a pair of tweezers, connecting one pair of joystick port pins at a time?