The Commission Game is an experiment-based experiential learning activity designed to elicit students' sincere ethical decision making in an ambiguous sales context. The activity includes multiple relevant stakeholders as well as tangible, shared risk/reward elements. The activity's design encourages students to contemplate their own personal code of ethics and to evaluate the influence of their ethical beliefs on their decision making. This paper describes the activity's process and provides implementation and assessment materials. (Contains 2 figures and 2 tables.)