Drive tanks around and blow things up.
You command a small division of tanks. Your orders are to destroy the enemy base. Your opponent is another person, just like you. His orders are to destroy your base. Who will win? Tank's fast pace is balanced by the subtlety of strategy. Like chess, but only a few minutes long and you get to blow things up.
Have it all figured out? Then advance in rank and get matched against better players on trickier battle grounds. Or meet your friends on a custom channel, then distract them with your own witty taunts.