Astroblast

Most probably the only Atari 2600 game to incorporate the use of either a Joystick or Paddle controller.

Two different versions of this game exist. In the original version, if two joysticks are plugged in and both moved at the same time during the game, the following effects will happen (the same effects will happen if you use either controller): the laser base will fly up into space or below the bottom border, the laser base will become invisible and when a rock hits it, the screen will turn red, the base count will cycle from 99 down to zero, and/or the joysticks will stop operating.