This paper explores the implications of conceiving, designing and prototyping location-based mobile games (LBMGs) that bridge the real and the digital into fascinating and unexpected hybrid worlds. The distinguishing traits of these games make them pop up as a compelling contemporary field for design research and practices, where design knowledge is informed in multiple ways: from posing the questions of relating to/embedding technology, to addressing design issues, from ruminating and dealing with UX and UI, to assessing communicative aspects. Moreover, being situated in a specific context and addressing unpleasant topics in the meanwhile, these games prove to be further challenging. The result from our study is that especially when the de...