Originally Posted by Ravenous IE
Completed a multiplayer game, while representing a nation.
Start up as usual the standard 100m race with an extra controller, it doesn't matter who wins the race just as long as you compete in the race to the finish line you'll unlock this.
FYI: This one can also be unlocked by playing a quick match on Xbox Live if you don't have an extra controller. That's how I got it.