<Table> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Source </Th> <Td> </Td> </Tr> </Table> <Tr> <Th> Source </Th> <Td> </Td> </Tr> <P> The first video games appeared in the 1960s . They were played on massive computers connected to vector displays, not analog televisions . Ralph H. Baer conceived the idea of a home video game in 1951 . In the late 1960s, while working for Sanders Associates, Baer created a series of video game console designs . One of these designs, which gained the nickname of the 1966 "Brown Box", featured changeable game modes and was demonstrated to several TV manufacturers, ultimately leading to an agreement between Sanders Associates and Magnavox . In 1972, Magnavox released the Magnavox Odyssey, the first home video game console which could be connected to a TV set . Ralph Baer's initial design had called for a huge row of switches that would allow players to turn on and off certain components of the console (the Odyssey lacked a CPU) to create slightly different games like tennis, volleyball, hockey, and chase . Magnavox replaced the switch design with separate cartridges for each game . Although Baer had sketched up ideas for cartridges that could include new components for new games, the carts released by Magnavox all served the same function as the switches and allowed players to choose from the Odyssey's built - in games . </P> <P> The Odyssey initially sold about 100,000 units, making it moderately successful, and it was not until Atari's arcade game Pong popularized video games that the public began to take more notice of the emerging industry . By autumn 1975, Magnavox, bowing to the popularity of Pong, canceled the Odyssey and released a scaled - down version that played only Pong and hockey, the Odyssey 100 . A second, "higher end" console, the Odyssey 200, was released with the 100 and added on - screen scoring, up to four players, and a third game--Smash . Almost simultaneously released with Atari's own home Pong console through Sears, these consoles jump - started the consumer market . All three of the new consoles used simpler designs than the original Odyssey did with no board game pieces or extra cartridges . In the years that followed, the market saw many companies rushing similar consoles to market . After General Instrument released their inexpensive microchips, each containing a complete console on a single chip, many small developers began releasing consoles that looked different externally, but internally were playing exactly the same games . Most of the consoles from this era were dedicated consoles playing only the games that came with the console . These video game consoles were often just called video games because there was little reason to distinguish the two yet . While a few companies like Atari, Magnavox, and newcomer Coleco pushed the envelope, the market became flooded with simple, similar video games . </P>

When did the first home video game come out