In this paper, we study the effect of information complexity on player in-game behaviour and physiological responses during a dilemma-based crisis management game. We run a user study, where players attempt to solve a crisis scenario while their in-game and physiological activity is being monitored through game logs and wearable physiological sensors. Results show that information complexity has noticeable effects on players' decision making and physiological responses, while moderate correlation was found between specific in-game-and physiology-based behavioural features. This study is focused on exploring behavioural patterns correlated to various levels of information complexity. Our findings can be applied in future studies aiming at designing per-sonalised crisis management training scenarios.