The first computer game that was ever created was probably the game OXO by Alexander Douglas in 1952. It was a version of tic-tac-toe. But most people consider the first true computer game where players actually participate to be Tennis for Two developed in 1958 by the physics scientist William Higginbotham. He wanted to teach about gravity, the force of attraction between masses. These men who created the early computer games did not forecast the potential for the popular use of games, because at that period in modern history it took a small room full of computers to make these games work! Another early game was Spacewar! developed in 1961 by MIT university student Steve Russell. In 1972 the company Atari produced the Pong game which was a huge commercial success; being a commercial success means that it made a lot of money. This was the true beginning of computer games that could be played at home.