Subway Surfers World Tour: Sydney is the fourth installment in the Subway Surfers World Tour Series and the ninth update of the game. Sydney came out with a new Characters, Kim, costing 95,000, and a new Hoverboard, Outback, costing 50,000. The update had a new feature, ! Keys are used to revive the Character, continuing the game when fail, and also to buy different Outfits for certain characters. But as usual, Keys are rare. They can be picked up while running or obtained by the Mystery Box. This edition was released on April 4th, 2013.