Firstly, this research is a collaboration with Granny’s Dancing on the Table, a transmedia film project in which the public has the chance to affect a film script through different social media channels. Before the actual film release there will be different game-episodes released in connection to the film. I have mainly been in contact with the game company Ozma, a part of the ‘Granny team’ working on cross-media games for the project. This thesis is a side-project with the aim of exploring a more “hidden universe”, which can later be applied to the design process.Secondly, the research provides a broad picture of the dilemmas faced when applying cryptic design strategies in an urban environment. I explore a few design qualities, how they can enhance user experience and make the user curious about hidden artefacts found on the street or in a public environment. I approached the problem by placing experiments linked to one of Granny’s Dancing on the Tables’ social media channels, in the streets and institutions of the Möllan neighbourhood in Malmö, Sweden. I collected information from both field studies and the interaction design world, regarding the application of design qualities to an artefact. Moreover, I based the research on street art, human behaviour, the psychology of curiosity and visual perception within the field of (transmedia) experience design. Based on my findings from these experiments and interviews I have come up with a set of guidelines to use when applying “hiddenness” to an artefact or design concept.