RollerCoaster Tycoon 4 Mobile is a construction and management simulation video game, developed by On5 Games and published by Atari, Inc.. It is an installment in the RollerCoaster Tycoon series, released on 10 April 2014. The original creator of the series, Chris Sawyer, had no involvement with the development.[3] The game was originally pay to play, but later, Atari announced that the game went free-to-play. Source: Wikipedia, "RollerCoaster Tycoon 4 Mobile", available under the CC-BY-SA License.