<Tr> <Th> Best - selling game </Th> <Td> Las Vegas Poker & Blackjack 1.939 million Major League Baseball 1.085 million (as of June 1983) </Td> </Tr> <Tr> <Th> Website </Th> <Td> www.intellivisionlives.com </Td> </Tr> <P> The Intellivision is a home video game console released by Mattel Electronics in 1979 . The name Intellivision is a portmanteau of "intelligent television". Development of the console began in 1977, the same year as the introduction of its main competitor, the Atari 2600 . In 1984 Mattel sold the Intellivision business to a former Mattel Electronics executive and investors that would become INTV Corporation . Games development started in 1978 and continued until 1990 when the Intellivision was discontinued . From 1980 to 1983 over 3 million Intellivision units were sold . </P> <P> In 2009, video game website IGN named the Intellivision the No. 14 greatest video game console of all time . It remained Mattel's only video game console until the release of the HyperScan in 2006 . </P>

What was the best selling game for the mattel intellivision