In order to achieve a further reduction of delivery time, costs and emissions of the hinterland transportation of containers, The Port of Rotterdam Authority aims to raise the utilization rate of inland barge and rail capacity. Efficient transport planning methods are essential to achieve this. Synchromodality is the flexible and sustainable deployment of different modes of transport in a network under the direction of a logistics service provider, so that the customer is offered an integrated solution for his (inland) transport. The concept of synchromodal inland container transportation is promising, but not operational yet, since stakeholders need to make the mind shift from traditional planning to network planning. In order to provide transport planners, transport sales persons, and the customer with insights in how synchromodal planning can improve the network’s performance and reduce the supply chain costs, we created a serious game called Synchro Mania. This paper describes the design and development of Synchro Mania and summarises the results of the game’s evaluation.