Abstract Mobile digital media technologies, such as smartphones, have great potential for in situ storytelling in cultural heritage sites. By geo-locating narrative content across a site, it can be experienced simultaneously with the physical site, creating a situated narrative of historical relevance. However, looking at and interacting with mobile devices tend to capture the user’s attention and all too easily distract from the site. For this reason, it is important to strike a balance between immersion (into the digital content) and presence (in the physical site). In this paper, we describe an approach to locative storytelling for cultural heritage, which is based on the exclusive use of sound and music for all ludonarrative aspects of the experience and based on the concept of psychogeography, i.e., how places make us feel. Our case study is the Battle of the Boyne in Ireland, the site of the eponymous battle that took place on 1 July 1690 (O. S.) between the forces of the deposed King James II and those of King William III. The battle is considered one of the most significant events in Irish and English history and is part of a wider struggle for power across 17th century Europe. We present our narrative design, sound and music design, game design, which together are captured in our ludonarrative engine in which a combination of historical narrative, music narrative and spatial audio navigation are closely intertwined with game mechanics, creating an immersive experience for cultural, educational and intergenerational engagement.