Preface to the special issue on VS-Games 2015

The following special issue is dedicated to game technologies for serious applications. It is based on the best papers received for the Seventh International Conference on Virtual Worlds and Games for Serious Applications (VS-Games 2015) which took place in Skovde, Sweden, from 16 to 18 September 2015. The conference had 48 submissions from which these nine papers were chosen in terms of both their quality and their potential for a strong journal paper. The papers were revised significantly, and all had content added. They were subsequently reviewed by an international panel of experts whose comments benefited the finally accepted versions over two rounds of additional reviews.