This paper argues, that VR learning games are a promising approach to build motivating interactive learning experiences for abstract learning content in computer science education (CSE). This can be achieved, by using suitable metaphors, letting learners get in touch with abstract learning content in an immersive hands-on experience. In order to implement a successful game design that supports the learning content while utilizing the possibilities of VR, a design process is proposed. This process uses conceptual models in order to find suitable metaphors and connecting learning content with game design. The process is demonstrated for two VR learning games that are part of the Inside the System series of CSE serious games.