Choose game 13 and let the missiles reach the cities. Use all of your missiles without scoring any points. The city on the right will turn into ''RF'', the initials of Missile Command's programmer, Rob Fulop.
Fire three missiles at the top of the screen when the game starts, then press the Reset button before the missiles explode. You will score extra points when they do explode.
Start a new game of Missile Command. While any number of missiles are falling, press Select on the Atari 2600 console. While you're cycling through the games, the missiles will keep falling until they hit something.