Mattel Aquarius

While the Intellivision was Mattel's only dedicated gaming console of the 20th century, the company's home computer, the Aquarius, was functional as a gaming machine. The Aquarius and its successor, the Aquarius II featured ports of Intellivision games like Advanced Dungeons and Dragons: Treasure of Tarmin and BurgerTime. Unfortunately, the Aquarius was not very successful and enjoyed a lifespan of only a few months. Released in June of 1983 and discontinued in October of the same year, the Aquarius is a rare find for vintage computer and gaming enthusiasts.