Recent game technology ascends development of low-cost virtual environment to the next level in two domains: reality representation and user interaction or engagement. In architecture and urban design realm, realistic 3D representation become more important in such way of conceptualizing ideas and analyzing the context of design problem. This research will present development of virtual urban environment using game engine technology. Aim of this research is to promote game engine as a tool for visual representation, visual analysis and further basic tool for urban design study. At the end, we point out potentials as well as constraints both in technical and design method issues in game technology based on the research findings.