The Royal Netherlands Air Force (RNLAF) currently has the need to replace its fleet of F-16 combat aircraft due to aging. As a result of the introduction of a new aircraft, with advanced stealth capabilities, new weapons and sensors, and extensive network enabled capabilities the existing operational concept needs to be drastically changed. In order to support the development of new operational concepts and to perform operational analysis, quantitative studies in the form of constructive and virtual analysis (humanin-the-loop) are performed. In order for constructive analysis to discover trends and generate statistically reliable results, a large number of experiments have to be conducted. This requires analysis- and simulation models. Supporting the RNLAF, TNO Defence, Security and Safety developed a generic aircraft simulation model. This simulation model includes both sophisticated simulation of hardware components like sensors and missiles, as well as simulation of the aircraft’s tactical behaviour. In this paper we describe how behaviour modelling techniques from the domain of (serious) games were used to develop a composable and flexible behaviour module in which the aircraft’s tactical behaviour is modelled. This behaviour module is kept separate from the simulation suite in which the aircraft is modelled, ensuring the behaviour module can be reused in combination with different simulation suites and for other applications.