Computer game modding, from modifying, combines several important issues: digital skills, play, community, making, and remixing. Yet, little academic work has explored the motivations and sense of community that modders have. This study is the first quantitative survey of game modders, and combines quantitative survey data with qualitative interview material. Findings suggest that modders are both old and young, mod more than one game or game series, have a strong sense of community, and enjoy helping others. Many respondents had contributed to other mods or had co-authored mods, and modding communities may function as online collaboratories. Although some research stresses how modders hope to get jobs in the gaming industry, overall the industry was not a motivator for most respondents.