According to the 2011 Horizon Report, one of the top 6 tech trends for higher ed is game-based learning.
(If you want to know more about the top 6 trends, read an article from the Chronicle of Higher Education )
Game-based learning is expected to see greater use within the next two to three years, the report says. And game-playing may help to develop decision-making and problem-solving abilities, as well as leadership skills. The report points to multiplayer role-playing games as offering particular promise for higher education.
Do you want to see some examples of games for learning?
Go visit Games for Change (http://www.gamesforchange.org/)
In this web-site, you can find various interesting games for learning. Many games are designed for students under K-12. But there are some games that are for 18 or older people such as 'Climate Challenge'
So why don't you consider and try to incorporate online games into your traditional or online courses? It can be another great tool to help students to learn better.