Wetzel, RichardBlum, LisaFeng, FengOppermann, LeifStraeubig, MichaelEibl, Maximilian2017-11-222017-11-222011978-3-486-71235-3https://dl.gi.de/handle/20.500.12116/7913_Tidy City_ is a mobile location-based game concept that is easy to appropriate. The game has been designed with simplicity in mind so that everyone can implement their own designs within the given structure and share it online. The system comprises a game-client for Android devices and a pair of dedicated authoring tools that combine in-situ mobile use with browser-based desktop use. This paper briefly describes the reasoning behind this approach, the game design and mobile client implementation and then describes the two integrated authoring tools in more detail. The complete set of Tidy City tools and the game-client are available free of charge for non-commercial purposes at http://totem.fit.fraunhofer.de/tidycity.enmixed realitylocation-basedgameauthoringuser-created contentText/Workshop Paper