Why is it that every game that happens to have guns in it must have a multiplayer mode? Example of multiplayer that nobody seems to play is Assassin's Creed. Making its debut in Assassin's Creed: Brotherhood I've always found the multiplayer in the AC series to be a unique take on the traditional model. Its blend of trickery, misdirection, and straight up stalking is a decent amount of fun. Again it just doesn't seem to be as popular as the big three.
The only multiplayer I've dealt with this year frequently has been Uncharted:3 and DARK SOULS.