Video games in general and educational role play games in particular would increase in believability if Non Player Characters reacted appropriately to the player's actions. Realistic and responsive feedback from game characters is important to increase engagement and enjoyment in players. In this paper, we discuss the modelling of autonomous characters based on a biologically-inspired theory of human action regulation taking into account perception, motivation, emotions, memory, learning and planning. These agents populate an educational Role Playing Game, ORIENT (Overcoming Refugee Integration with Empathic Novel Technology) dealing with the cultural-awareness problem for children aged 13 to 14. © 2009 Springer-Verlag.