"Gran Turismo (commonly abbreviated to GT or GT1) is a racing simulator designed by Kazunori Yamauchi. Gran Turismo was developed by Polyphony Digital and first published by Sony Computer Entertainment in 1997 for the PlayStation video game console. The game was originally only sold in Japan but the popularity of the game led to a European version and then an American version being sold in other countries. After five years of development time, it was well-received publicly and critically, shipping a total of 10.85 million copies worldwide as of April 30, 2008, and scoring an average of 95% in GameRankings' aggregate. The game has started a series, and to date has spawned over 10 spin-offs and sequels."
Source: Wikipedia, "Gran_Turismo_(video_game)," available under the CC-BY-SA License.