Despite much evidence showing the effectiveness of game-based and drill-based training to be included in team sport training programs, there have been no discussions about which training method is most effective in young male volleyball players. This study aimed to compare GBT versus DBT on fitness quality, technical skill, and psychological traits of U-17 male volleyball project players. This study used an experimental pre-test and post-test comparison group design. Forty U-17 male volleyball project players who practiced in Bahuk and Injibara Elementary School at Injibara town in 2022/23 were the target population of this study. Their ages were 15 and 16 years. A census approach (entire population) was used. Subsequently, all 40 players were randomly assigned to either the GBT or the DBT group. Before and after 12 weeks of GBT and DBT intervention, the data was collected from fitness tests (T- test, 30-second jump test, vertical jump test, and 30-meter sprint test) and technical tests (serving, passing, setting, and spiking skills). In addition, standard questionnaires were employed to assess psychological traits such as motivation (SMS-6) and team cohesion (GEQ). The study employed both descriptive (mean and SD) and inferential statistics (paired and independent t-tests) to analyze the data. To ensure robust interpretations, normality (Shapiro-Wilk) and variance homogeneity (Levine's test) were confirmed. Further, data analysis utilized SPSS Statistics (Version 27). A strict p ≤ .05 significance level was set for all hypotheses. The study found that 12 weeks of GBT significantly improved young male volleyball players' agility, muscular endurance, power, and speed, compared to DBT. In addition, the GBT group showed significant improvement in serving, passing, setting, and spiking skills. Furthermore, players in the GBT witnessed a statistically significant improvement in their motivation level and Group Integration-Task (p < .05). Therefore, 12-week GBT appears to be an effective way of improving fitness qualities, technical skills, motivation level, and team cohesion of U-17 male volleyball project players. Future studies with larger sample sizes, diverse demographics, and longer training periods were warranted to solidify the generalizability and long-term impact of GBT on fitness qualities, technical skills, and psychological traits across various sports and populations.