Background. Business simulation games have been used since 1979 at the University of Pécs. Since 2000, two games have been taught: a green business simulation developed on site and known as BUSINESS SIMULATION CHALLENGE and the MULTINATIONAL MANAGEMENT GAME. In this research we report on a longitudinal study of the results of the two business simulations; and investigate the effects of the Green Business simulation. Method. This survey-based research included 329 students that completed a questionnaire on business simulations since 2000. Surveys were carried out to measure the effect of the two simulations. There are data from three periods up to recent years. Frequency tables, univariate ANCOVA, T-tests and cross-tabulation were used to analyse the data. Results. - Generations’ attitudes and skills do not change with the passage of time, and the skills and knowledge, conveyed by the simulations can be considered as constant throughout the period. - This study confirms that main managerial skills are developed with simulation games but there is no need for enhanced mathematical and financial knowledge. - The green simulation successfully developed the green attitude of students, but only in cases where the green option was rational. - More educated students enjoy greater challenges, namely the need for deeper analysis. - Simulation courses in universities provide a higher level of motivation than do commercial simulations. Conclusion. It can be stated that almost the same results can be achieved by general purpose simulations which have a different focus (analytical or strategy-oriented game). Results also indicate that more simulation courses in universities would stimulate higher student motivation.