Atari presents Mario Bros. from 1983. It promises exciting two-player action for your Atari 2600 and 5200 in an arcade port of some sort of plumbing simulator, it'll never catch on.
Mattel bring Advanced Dungeons and Dragons to your Intellivision. Ignore the archer with the impossibly wide stance trying to down the big green monster and look at that screenshot. Is that a snake? jewel? castle? wolf? Use your imagination... but I don't think the Intellivision control pad has enough buttons to keep up with my imagination!
The sequel to the first AD&D, Treasure of Tarmin would be released by Mattel not long after the first game, which was called Cloudy Mountain apparently. Again for this ad, ignore the archer surrounded by nasties, holding a bow that's taller than he is, and look at that in-game screen. Is that a spider? a Catoblepas? a blue polyhedral dice eating monster? Holy crap it's like Doom with arrows.