From Scientific American:

Tobacco use among active-duty military personnel is almost double what it is in the civilian population, and while smoking has decreased overall in the U.S., it’s been on the rise in the military since 2002. To change that, the Department of Defense (DoD) is looking to…videogames?

The government agency has awarded researchers at M. D. Anderson Cancer Center in Houston a $3.7 million grant create a video game that will deter soldiers from smoking and help those who already do to quit.

"The video game in general is becoming more popular among researchers who want to deliver a health message to a target audience," says Alexander Prokhorov, a professor of behavioral science at the University of Texas M. D. Anderson, who will lead the work. Video games are also being used to teach people about nutrition, asthma and other health-related issues, he notes.