PC Invaders is a hack of the game (it plays exactly the same as the original 2600 version, although with the double shot bug automatically enabled), having changed game sprites, as the invaders, players' laser cannons, bunkers, and the Command Alien Ship look different, as everything has been changed to a computer theme: the laser cannon is now a penguin (representing Linux), the invaders are various PC symbols (a cursor pointer, Windows and Windows 95 logos) and the Command Alien Ship is now comprised of the initials BG (which is assumed to be in regards to former Microsoft president Bill Gates).