THQ and UFC have released new game on Facebook - UFC Undisputed Fight Nation - and giving away an all-expenses-paid trip for two to see UFC 131 live in Vancouver.

To enter, players must reach level 5 in the Facebook game and follow the commands of onscreen pop-up. In addition to the grand prize, one person will receive an autographed UFC poster and a $250 UFC gift certificate, and ten people will receive $50 UFC gift certificates for use on ufcstore.com.