From museums to memorials, all cultural heritage institutions are constantly driving the digital transformation of their educational outreach. In the process, digital interactive activities such as games have established themselves as successful formats; and immersive technologies such as VR goggles and also AR-ready smartphones are increasingly gaining popularity to engage visitors on a new level. Looking at the specific context of cultural institutions, and with the aim of further exploiting the possibilities of XR media, the contributors to this volume present a series of best-case projects and theoretical approaches to discuss opportunities and challenges for institutions, audiences and game developers.