Creative performance is essential for creative companies in the game industry, especially when the competition is getting higher. This study aims to see how a high-performance work system, organizational creative climate, and creative process engagement can improve creative performance in game companies. This study used a survey to collect data. A total of 123 respondents participated, and the data was analyzed using SmartPLS 3. Results show that both organizational creative climate and creative process engagement significantly affect creative performance. Furthermore, both also act as mediating factors between a high-performance work system and creative performance. A high-performance work system surprisingly does not have any direct effect on creative performance. Still, it has a significant indirect effect on creative performance when creative process engagement and organizational creative climate are used as the mediator. Thus, this study provides the theoretical and empirical basis for factors affecting game companies’ creative performance.