With the increasing popularity of mobile video games, game designers and developers are starting to integrate geolocation into video games. Popular location-based games such as Ingress or Pokémon Go have millions of users, yet little is known about how the use of such games influences the nature of a user's interaction with other users and their physical surroundings. To investigate how location-based games are integrated into a player's daily life, how they influence a player's mobility through the city, their perception of places and the role of human territoriality in this context, we have developed a location-based mobile multiplayer game called CityConqueror. In this paper, we present CityConqueror and the results of a study, which has focused on participants playing the game over a period of two weeks. The findings show that locationbased games can be designed to give the player the illusion of playing in the context of the "real" world rather than a virtual or hybrid game reality. Our findings also suggest that location-based games can have a strong influence on a player's mobility and perception of urban space and that human territoriality can be expressed through location-based games. Based on our findings we propose a series of design implications for the design of mobile location-based games.

With the increasing popularity of mobile video games, game designers and developers are starting to integrate geolocation information into such games. Although popular location-based games (LBGs) such as Ingress and Pokémon Go have millions of users, research still needs to be carried out to fully understand the ways in which such games impact upon a player's interaction with other players and their physical surroundings. Consequently, there is limited knowledge on how user behavior can be addressed and drawn upon as a design resource to further engage and motivate players to play. To further understand this, we developed a LBG called CityConqueror and have conducted an in 'the wild' study. This initial study starts to unpack the ways that human territoriality can be expressed in LBGs to facilitate player motivation, engagement and can support the integration of the game in the player's daily life. Based on our findings we propose a series of design implications for LBGs. The primary purpose of this paper is to draw attention to the importance of territoriality and the way that this can be drawn upon as a resource for design.