In this paper we focus on the use of a combination of socio-scientific issues (SSI) and simulations. We have developed an augmented reality (AR) simulation called Transformer. The SSI narrative in Transformer concerns an electric transformer station situated in an area close to a planned new campus. Students’ task is the issue if it is advisable to build a campus area. The simulation is organized as a role-play. The students take part in groups, playing one of five different roles. The aim of this study is to explore students’ ways of using knowledge in relation to the AR simulation. We investigate how students integrate science and other knowledge in the debate constituting the final part of the role-play. The study is a part of a research process, guiding the researchers to further develop Transformer. The study showed that students justified their positions using scientific evidence and information collected through their own efforts outdoors in the real and actual environment where the AR simulation was situated. Students kept the controversy that existed between the different roles alive throughout the debate and stayed focused on the issue in question. We argue that this is due to the situated context achieved through the simulation.