Subway Surfers is an "infinite" mobile game developed jointly by Killu, a private company based in Denmark and SYBO Games. It is available on Android, iOS, Kindle, and Windows Phone platforms. Players play the role of young railroad workers, running around the track to escape the inspector and his dog if graffiti (marking) is caught at the subway site. As the thugs move, they blow gold coins out of the air and avoid collisions with railroad cars and others with objects. Special items such as weekly hunting can provide prizes in the game.
Subway Surfers was released on May 24, 2012, with seasonal holiday updates. Since January 2, 2013, the update is based on a "World Tour" in which the game is held in the new city every month.