Urban design faces challenges in engaging the public for Nature-based Solutions (NBS), hindering sustainable development. With the support of the Marie Skłodowska-Curie Actions programme, the PACT-NBS project aims to bridge this gap. By integrating public value frameworks into serious gaming tools, PACT-NBS facilitates the co-creation of NBS projects. It systematically establishes public value metrics, develops gaming tools aligned with environmental and social objectives, and offers a holistic co-creation framework. Going beyond existing approaches, PACT-NBS aligns with the EU’s Green Deal and SDGs 6 and 11. Leveraging researchers’ expertise and cross-European collaboration, PACT-NBS not only enhances NBS planning but also advances climate and social resilience, forming an international network for sustainable urban development.