METHODS: The ReReki module was developed using the analysis, design, development, implementation and evaluation model, based on the theory of planned behaviour. Content validation involved six adolescent health experts, using Russell's model validity approach and a content validity questionnaire. Games were then designed to complement the Sexual and Reproductive Health (SRH) materials. The gamified ReReki module was pre-tested with 20 adolescent boys from a selected school, and the language was refined by a linguistic expert.

RESULTS: The module included five main topics, 29 subtopics and six games. The overall content validity score based on the survey method was 81.8%, while that based on Russell's model was 79.3%, indicating a high level of validity for the ReReki module. One new topic and two subtopics were added, while two subtopics scoring below 70% were flagged for further review. The adolescent boys expressed their acceptance of the gamified SRH content.

METHODS: Using a non-randomized, two-district quasi-experimental design (one district assigned to each arm to minimize contamination), knowledge was assessed via a validated questionnaire at baseline, 1 month, and 3 months. All 260 enrolled participants were analyzed under an intention-to-treat approach using a repeated-measures ANCOVA (arm × gender × time); 15 participants (5.8%) were lost to follow-up by 3 months.