People lined up on the Brookhaven National Laboratory Annual Visitors' Day to play Tennis for Two in 1958 in Upton, USA. It's the first ever computer game 2 opponents could play.
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The game's inventor, American physicist Willy Higinbotham, developed it as a novelty to attract guests to the open day. It's displayed on a device normally used to detect electrical currents, known as an oscilloscope.
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Players fought rally after rally in an endless, scoreless game of tennis. - Twist to angle your hit. - Press to hit the ball. The game was so popular that Higinbotham decided to display it again the following year, but with 2 extra settings: Tennis On The Moon: Players could slow the game down and make the ball lighter, as though they were playing on the Moon, where gravity is slower... Tennis On Jupiter: ...or they could speed it up and make the ball heavier, as if playing tennis on Jupter, where gravity is stronger.
