I have been enjoying Killer Queen Black.
I started playing KQB in beta, on the recommendation of some friends who played the arcade version regularly in a bar. This game is a hoot!
In addition to a 'Military' win where you beat up the other team with flying creatures that operate a heck of a lot like the awesome ostrich riders in Joust, you can also win by collecting berries ("Economic") or racing a snail across a finish line ("Badass".)
Three-player teams take on three-player teams, or you can just play vs the AI.