This research models a sustainable development through a serious game. The sustainable development system is influenced by internal factors and external factors. Internal factors consist of three sub-systems, namely: Culture, structure and technology. External factors consist of three sub-systems, namely: environment, economic actors and socio-cultural actors. The model in this research is agent-based involving three types of agents (firm, worker, and policy), internal variables, and external variables using a dynamic system. The behavior of each variable is observed using a dynamic system model. By providing initial values in internal factor variables and external factor variables, agent movement can provide information about the firm-size condition, the income of workers and the effect of policy on the development of companies and workers. Determination of initial data from internal factor variables and external factor variables aims to achieve a balance between supply and demand. In a certain phase, it will produce an optimal value, shown by supply and demand are at the same point. This condition needs to be maintained by adjusting all input variables so that supply and demand are in an optimal position.