In Germany Mentos is online with a funny advergame: the Sheep Volley!
You can play & train or play to win, and in this case you need to register. You can also choose to challenge a friend, sharing the same keyboard.
One of the nicest thing in the game is that they can take pictures of your(as a sheep) while playing so that you'll send them to your friends (see below). Furthermore you can earn more points if you manage to collect Mentos candies during the game.
I think AS Interactive did the nice job, but I'm not 100% sure.