Gender-oriented games have been prevalent in cultural media, perpetuating stereotypes that promote gender inequality. As an alternative, what insights could be gathered from a game designed for gender-neutrality? We present a case study of a gender-neutral game design within a STEAM diversity initiative to engage younger populations. A qualitative methodological approach was followed to analyze gameplay rehearsal observations and interviews, focusing on playful behavior, cooperative gameplay, social interactions, competence development, and gender-related aspects. Players engaged in mutual collaboration, encouraging and suggesting actions and strategies, while also adopting gender-specific differentiation language regarding their role play. From coded evidence, we propose three design insights that might influence the perception of gender-neutrality: (i) multiple activity modes that offer tasks diversity, (ii) a collaborative environment, featuring egalitarian roles and (iii) audiovisual representations adopting neutral gender patterns.