The game chosen for the present research is developed by the American Army for the purpose of online training of the world wide public and recruitment. The America's Army game is an online game, a combination between entertainment and defence, being a result of the modelling and simulation ideas used by American Army after the 80'. The game is a model for transforming and turning the PC game into a communication medium, applying virtual environment and video-game technology to training tasks and recruitment and bridging the gap between these technologies and the operational-warfare environment. The present research proves that the America's Army game environment -by its means of presenting the military information- induces the same brain potential (P3b) as in the case of administration of powerful drug stimulants, as cocaine, methylphenidate.