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
History of video games Sega Enterprises's "Periscope" (1967) and Chicago Coin's "Speedway" (1969) pioneered the adoption of elaborate visual displays and electronic sound effects in the amusement arcade. Consequently, when a recent engineering graduate from Utah with experience running coin-operated equipment named Nolan Bushnell first saw "Spacewar!" at SAIL in late 1969 or early 1970, he resolved to build a coin-operated version for public consumption. Enlisting the aid of an older and more experienced engineer named Ted Dabney, Bushnell built a variant of the game called "Computer Space" in which a single player-controlled spaceship dueled two hardware-controlled flying saucers. Released in late November or