sentences:  As part of Audi A1 clubsport quattro premiere at Wörthersee Tour 2011 and Need for Speed World reaching 5 million registered users, the vehicle could be driven in "Need for Speed World" as a free in-game rental car between 2011-06-01 and 2011-06-04.The in-game vehicle was subsequently made available by using a redeem code as part of the game's 30 million registrations celebration.An updated version, called Audi A1 clubsport quattro Speed Edition, was available for 20 Audi Retweet contest winners hosted by Twitter between 2011-06-21 and 2011-06-26.