A game designed by the Swiss Federal Office for Public Health. It is one of the examples given by BJ Fogg from the Captology dept. of Stanford University to explain what Persuasive Technology can do. They argue that the game is designed to persuade sexually active people that unprotected sex is dangerous, the ultimate goal being to motivate condom use.
While I can see that, in this case, the chosen media makes it easy to reach more (younger) people that videos or brochures could, I am only mildly convinced by its possible effects.