Addressing food waste is a critical concern for the sustainability of our environment. Various approaches have been utilized, such as campaigns to educate the general population to be more mindful and responsible. However, when targeting children, especially on school premises, there is a notable lack of engagement and effectiveness compared to their impact on other demographic groups. Serious games promote the development of social, cultural, and cognitive skills. Through game-play, children acquire content knowledge, enrich their experience, and become engaged with the learning information. Recognizing the opportunity of these tools, we created “Masters Against Food Waste” designed and developed to impart children with strategies to combat food waste. The results of a study with 22 students yielded positive results, highlighting the game’s potential to raise awareness and prevent food waste effectively.