Education has always been modified by employing different technologies to enhance the knowledge acquisition and performance of students. Virtual Reality (VR) along with the Game Industry is among those evolving technologies for educational applications. This study aimed to design, implement, and evaluate an immersive VR-based Educational Game (IVREG) for learning topology relations. Topology relations are one of the fundamental topics which exist in Geospatial Information Science (GIS); due to the great capabilities offered by GIS, learning these basic topis is of great importance. A total of thirty-seven male middle-school students participated in this study. A total of four questionnaires were designed to evaluate the suitability of the proposed learning environment and its components at schools, particularly for learning geospatial topics. In conclusion, students found the IVREG useful and effective in classrooms. Additionally, the results showed that the components, namely the integrated pedagogical approach, gamification, and VR technology, were all suitable for being used at schools. On a final note, however, the study indicated that the immersion aspect of such learning environments should be enhanced in future studies.