This exploratory qualitative study provides insight into the role that exergames can play for seniors. Fifteen participants (aged 53-78) engaged in playing Your Shape Fitness Evolved 2 on the Xbox 360 Kinect. We conducted semi-structured interviews with each participant and we found that in all cases, their innate psychological needs of autonomy and competence (Self Determination Theory) were met. Playing the exergame not only served as a serious therapeutic instrument with positive effects on the subjective physical and social wellbeing, but it also brought entertainment, providing excitement and fun.