There is an urgent need for urban environments to be more flood resilient. The public can participate in addressing this by adopting household sustainable drainage solutions (SuDS). However, their lack of knowledge and awareness is a barrier. This paper presents an educational serious game to overcome this barrier and explores whether it can educate citizens about private household SuDS (and to what degree). A serious game named Sudsbury is designed to educate the public on household SuDS and the urgency to adopt them in the context of climate change and urbanisation. A study of 14 urban inhabitants participated in three game sessions evaluated with pre and post-game surveys. The study found that Sudsbury is a fun and engaging public intervention method successful in educating and impacting personal norm attitudes, with the potential to create growth in support and adoption of household SuD. Sudsbury was most successful in improving knowledge acquisition of household SuDS but found comprehension of concepts was limited by deficiencies in the game realism.