Mathematical reasoning is a modern learning media that is suitable for improving mathematical thinking. Problem Based Learning is one learning model that can help enhance reasoning. This article aims to design multimedia learning in the form of educational games to enhance students' mathematical reasoning. This research is a type of development research using the Multimedia Development Life Cycle model. The procedure includes six stages, namely concept, design, collecting materials, assembly, testing, and distribution while this research is limited to the design stage. The subjects of the study consisted of teachers and students class 8 of SMP Muhammadiyah 1 Kalasan. The research instruments were observation guides, interview guidelines, and documentation sheets. Observation guidelines are used to retrieve student characteristics data while interview guidelines are used to determine the characteristics of students from the teacher's perspective during the learning process and documenta.....

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