Exergames are a fun and engaging way to participate in physical activity. Exergame users consistently require new content to maintain interest in the activity. One way to provide users with high quality content with minimal development work is to convert existing off-the-shelf digital games into exergames by using the game's "modding" interface. To explore the potential of converted exergames for inspiring high exertion levels we performed a conversion on two popular games: Half-Life 2 and The Elder Scrolls V: Skyrim. The conversions were performed in two stages. The first stage mimics existing conversion techniques and a second stage provides added incentive for players to reach higher exertion levels. A study of 18 participants found that the resulting games support anti-sedentary levels of exertion while falling slightly below national recommendations for cardiovascular exercise. Adding exercise to the games did not affect players' enjoyment.

Youth with cerebral palsy (CP) can experience social isolation, in part due to mobility limitations associated with CP. We show that networked video games can provide a venue for social interaction from the home. We address the question of how to design networked games that enhance social play among people with motor disabilities. We present Liberi, a networked game custom-designed for youth with CP. Liberi is designed to allow frictionless group formation, to balance for differences in player abilities, and to support a variety of play styles. A ten-week home-based study with ten participants showed the game to be effective in fostering social interaction among youth with CP.