Youths in Indonesia have different backgrounds, including religion, tradition, social environment, but there are similarities in-games. This study aims to analyze the effectiveness of OMG app use and changes in mindset among youths regarding understanding religious tolerance. This study used mixed methods. The data was collected using questionnaires, observations, and interviews. The Moderate Game (OMG) app effectively improved youth religious tolerance with an average relegious tolerance score in the control class of 51.46. In the experimental category, the average holy tolerance (...) score was 74.56. Based on gender, the level of religious tolerance in youth males had a higher score of 75.08 than youth females of 74.04. While based on religion, Muslim youth had a higher level of religious tolerance than other religious youth, with 81.10. Contribution : The Moderate Game (OMG) app can help young people, communities, and governments overcome the rise of social, religious, and even overcoming intolerant, extreme societies. (shrink)