1. University of Koblenz, Germany
2. Saarland Informatics Campus, German Research Center for Artificial Intelligence (DFKI), Germany and HCI Games Group, Games Institute, University of Waterloo, Canada
3. HCI Games Group, Games Institute, University of Waterloo, Canada
4. Stratford School of Interaction Design and Business, University of Waterloo, Canada and HCI Games Group, Games Institute, University of Waterloo, Canada