Dr. Ola Ahlqvist worked professionally with local and regional environmental planning in Finland and Sweden in the early 1990's. After completing a PhD in Geography at Stockholm University in 2001 followed by post-doctoral training at Penn State University he joined The Ohio State University Department of Geography in 2005. His research interests revolve around three broad areas: 1) semantic uncertainty and formal ontology in analysis of land cover change, landscape history, and visualization. 2) how online maps, social media, and games form a nexus for spatial collaboration, social-environmental simulation, and decision making. 3) the scholarship of teaching and learning in GIS and Service-Learning. Christoph Schlieder is Chair of Applied Computer Science at the University of Bamberg, Germany and leads the research group on Computing in the Cultural Sciences. He holds a Ph.D. and a Habilitation degree in computer science, both from the University of Hamburg. Before coming toBamberg he worked at the University of Bremen where he headed the Artificial Intelligence research group. His research interests focus on methods from semantic information processing and their application to problems from the cultural sciences. Most of his scientific work puts an emphasis on spatial modelling. He has widely published on technical topics including qualitative and diagrammatic reasoning, preferred mental models, geo-spatial semantics, and mobile assistance systems. Since 2004 he designs and analyzes geogames and, more specifically, location-based games played outdoors on mobile devices.

• Foreword.- Introducing Geogames and Geoplay – Characterizing an emerging research field.- Defining a Geogame genre using core concepts of games, play, and geographic information and thinking.- OriGami – A Mobile Geogame for Spatial Literacy.- Spatial Game for Negotiations and Consensus Building in Urban Planning: YouPlaceIt!.- Addressing Uneven Participation Patterns in VGI through Gamification Mechanisms.- Teaching Geogame Design: Game Relocation as a Spatial Analysis Task.- (Re-)Localization of Location-Based Games.- The Design and Play of Geogames as Place-based Education.- A cost-effective workflow for depicting landscapes in immersive virtual environments.- Structural Gamification of a University GIS Course.- Geocaching on the Moon.- Ludography.