<![CDATA[Low student interest and understanding of plane geometry in mathematics learning remain key challenges in improving learning outcomes. Classroom instruction that is still monotonous often leads to low student engagement in understanding concepts. This study aims to examine the effectiveness of developing a role-playing game (RPG) based educational game, “Say Math,” in improving students’ motivation and conceptual understanding of plane geometry. This research used a Research and Development (R&D) method with the Multimedia Development Life Cycle (MDLC) model. The participants were seventh grade students. Data collection techniques included student response questionnaires and concept understanding tests. Data were analyzed using descriptive quantitative analysis to evaluate media feasibility and learning improvement. Alpha testing results showed that the media functioned properly without technical issues, while beta testing indicated a user satisfaction rate of 88% and an average learning improvement of 23%. Based on these findings, it can be concluded that the “Say Math” educational game is effective in improving students’ motivation and conceptual understanding of plane geometry. This study implies that game-based learning media can serve as an innovative, interactive, and enjoyable alternative in mathematics education.]]>
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