Gaming software, DarkBASIC Professional (DBPro) is widely used for the games application. In this research, the software was applied as a tool to simulate human movement and behaviour within virtual environment. Emphasize is to accommodate the largest possible range of humans with diverse abilities as part of AUNT-SUE (Accessibility and Users Needs in Transport – Sustainable Urban Environment) project. Two subjects (adult and older people) were selected as the virtual entities. The virtual entities were modelled based on humans movement and behaviour in the real world. Lowel level validation and example of case study was presented in this paper.