Gamification evolved to one of the most important trends in technology and therefore gains more and more practical and scientific notice. Yet academia lacks a comprehensive overview of research, even though a review of prior, relevant literature is essential for advancing knowledge in a field. Therefore a novel classification framework for Gamification in Information Systems with the intention to provide a structured, summarized as well as organized overview was con-structed to close this gap of research. A literature review on Gamification in quality outlets combined with a Grounded Theory approach served as a starting point. As a result this paper provides a foundation for current and future research to advance the knowledge on Gamifica-tion. Moreover it offers a structure for Gamification research which was not available previous-ly. Findings from the literature review were mapped to the \ classification framework and analyzed. Derived from the classification framework and its out-come future research outlets were identified.