The authors analyze the complex interplay between rail infrastructure development and railway station area development in the Netherlands through the method of gaming-simulation, or serious gaming. The serious game SprintCity was developed in order to better understand and manage the dynamic interrelations between rail infrastructure and urban development of the Delta Metropolis in the Netherlands. So far, the game has been played in nine independent game sessions, with a total of around 70 stakeholders as players. The authors describe the design of the game in some detail and present the preliminary insights and results. Data before, during and after the game sessions are gathered through in-game participant questionnaires, data logging, observations and transcripts of end-of-game (debriefing) discussions between participants and the facilitator. The main conclusion is that the current prototype version of the game is supported by the stakeholder-players, significantly enhances the development and use of the underlying infrastructure-space model and generates questions for further scientific and policy research.