It seems like Flintstones technology now, but the Atari console, despite what I thought were clumsy controllers, was big entertainment and easy to use. Then you could go to an arcade and play Pong or PacMan on a big noisy machine (but who has quarters in their pockets today?) and rack up those points. We thought that was the first computer game machine, but the original one weighed over a metric ton, had only one game and its display screen was not the family television but a very small oscilloscope.
It was a hit, though. Designed by nuclear physicist Edward Condon of Westinghouse, the Nimatron non-programmable computer went on public, interactive display at the 1939 World's Fair. No one saw its potential at the time. Its game ("Nim") was based on an ancient strategy contest, probably from China, in which two players alternate removing one or more objects (i.e. beans, coins, pebbles, etc.) from different piles. He who removes the last object is the winner, or loser, depending on the version played. Sounds as simple as a child's card game, but there is more skill and tactics involved than this short description indicates.
The Nimatron was made with four lines of seven light bulbs each. The player takes a turn switching a light or two off, then the computer takes a turn (no pages of coding needed, just simple math). One hundred thousand Fair visitors tried to win, but the primitive computer won 90% of the time! As I remember with Atari, the Space Invaders won 100% of the time...
The Nimrod