Probably the most interesting accessory for the Intellivision was PlayCable, an adapter that plugged into the cartridge port. For $4.95, the cable company would transmit PlayCable subscribers 20 Intellivision games a month. All you did was select the game you wanted to play from a menu, and the game would download into the adapter's RAM where it could be played. Every month, the games would be rotated or changed, and users would receive new instruction books and overlays for each new game in the mail. It was discontinued in 1983 and the adapters were returned to Mattel, despite being pretty popular in the areas that offered it.