Welcome to the ACM SIGGRAPH conference on Motion in Games 2013. This is the 6th year of the conference and the first time that it is sponsored by ACM SIGGRAPH. Games have become a very important medium for education, therapy and entertainment. Motion plays a crucial role in computer games. Characters move around, objects are manipulated or move due to physical constraints, entities are animated, and the camera moves through the scene. Even the motion of the player nowadays is used as input to games. Motion is currently studied in many different areas of research, including graphics and animation, game technology, robotics, simulation, computer vision, and also physics, psychology, and urban studies. Cross-fertilization between these communities can considerably advance the state-of-the-art in the area. The goal of the Motion in Games conference is to bring together researchers from this variety of fields to present their most recent results, to initiate collaborations, and to contribute to the establishment of the research area. The conference will consist of regular paper sessions, poster presentations, and as well as presentations by a selection of internationally renowned speakers in all areas related to games and simulation. The conference includes entertaining cultural and social events that foster casual and friendly interactions among the participants.