Design Ethics is a challenging yet vital topic to address and teach, especially in an age where designers may think they are not ethically responsible for their creations. This paper describes the design of an ethics course where instructors used Research Through Design as a vehicle to teach design ethics to a class of master’s students. We describe how we introduced tabletop game prototyping using the Design Games Framework, a lecture-workshop-supervision format supported by a design diary, and student-led sessions to create a pedagogical structure for students to unpack and explore ethical issues. We discuss the design diaries and present reflections on developing reflexivity through game making, framing design as exploration rather than solution-making, and moving beyond dramatic elements when game-making. The course design and reflections provide guidance for design educators in integrating game-making activities in design ethics courses.