This book chapter proposes how to create intrinsic motivation for players in serious games based on Self-Determination Theory. Serious games are not just fun-based; they are designed with goals such as behavior change, motivation, and learning. However, many serious games do not go beyond traditional teaching methods and are developed by integrating game mechanics in a superficial way—often referred to as “chocolate-covered broccoli.” This limits both the motivational and learning effectiveness of the games. According to SDT, three basic psychological needs must be satisfied to ensure intrinsic motivation: autonomy, competence, and relatedness needs.

In the current study, the concept of “volition” is preferred over “autonomy.” This is because the goal is not merely to offer multiple choices or independence, but to create a meaningful path that the player willingly adopts. The model argues that offering meaningful choices, supporting identity formation, and allowing player decisions to have an impact—either on the player or the game—fosters volitional engagement. Another core need in the model is competence, which supports meaningful development and growth. Relatedness, meanwhile, emphasizes the importance of meaningful social connections. Furthermore, the model recommends designs that genuinely integrate learning content with game mechanics, stressing that adding game elements independently of the learning process does not enhance motivation. Within this framework, the SDT-based model is proposed as a guide for serious game designers and educators. It suggests that such a design will promote intrinsic motivation in players, ultimately leading to improved learning outcomes.