Design for motivation can be defined as a “design practice focused on the activation of human motives, with short or long-term effects, to perform an action” in a context. The paper proposes and develops a design tool called DEMO (DEsign for MOtivation) that aims to address motivation in innovation communities. The DEMO tool is theoretically grounded in motivation theories and based on existing game-like approaches for the development of motivational concepts. The tool incorporates gamification elements, design elements and targets to support multidisciplinary teams in designing for motivation. One application area of the tool is in innovation communities where the design to support user participation and contribution is a complex task, while there is limited understanding how to practically apply motivation. An expert usability evaluation reflected a positive overall experience with the tool. The contribution of this paper lies in its description of the tool and its report on the usability evaluation. Future research in the field should focus on the application of the design tool with various methods in diverse cases.