In educational settings, gamified learning integrates a variety of game elements to improve the learning experience, but a thorough analysis comparing different combinations of these elements is sparse. This meta-analysis consolidated data from 182 effect sizes across 37 randomized or quasi-randomized trials to assess the impact of gamified learning on student outcomes. Statistical analyses were conducted with gamified learning as the independent variable, learning outcomes as the dependent variable, and learning domain, learning stage, and intervention duration as moderating variables. The study aimed to evaluate the overall effect of gamified learning and to determine the most effective combinations of game elements. The results revealed a medium positive effect of gamified learning on learning outcomes (d = 0.566), with the "Rules/Goals + Challenge + Mystery" combination yielding the highest impact. And significant moderation was observed regarding the learning domain and the duration of the intervention. These findings offer valuable guidance for the design and application of gamified learning strategies, highlighting the need to consider moderating factors in educational practice.