A game simply isn't a game unless at least two people are playing. That's when the fun begins. The first person makes their move and other player counters, usually followed by the sinister catchphrase, "two can play at that game." This often applies to the games people tend to play in relationships, and that's where the real fun begins.
Or they just end up as funny but harmless memes on the Internet. There is no pain, or personal anguish... only funny pictures and occasional laughter. Check out this slideshow of people trying to one up each other, and see for yourself if two can play at this game, really.