Gran Trak 10 for two games to be played for a quarter rather than one. A placard on the front of the game gives suggested ratings for the score in a given game, from "License Revoked" for 10 or fewer points to "Real Pro" for greater than 40; the operator's manual suggests changing or removing this card if the time per game is adjusted. In the fall of 1973, Atari began work on a driving game, an idea founder Nolan Bushnell had wanted to do since the company was initially founded in June 1972 before it was shelved in favor of "Pong". The
Spacewar! coin-operated video games. While playing "Spacewar" at Stanford sometime between 1966 and 1969, college student Hugh Tuck remarked that a coin-operated version of the game would be very successful. While the high price of a minicomputer prevented such a game from being feasible then, in 1971 Tuck and Bill Pitts created a prototype coin-operated computer game, "Galaxy Game", with a US$20,000 PDP-11. Around the same time, a second prototype coin-operated game based on "Spacewar", "Computer Space", was developed by Nolan Bushnell and Ted Dabney, which would become the first commercially sold arcade video game and the first widely available video