What is your favorite 3rd party Wii U game? Based on Gameplay, Technical/implementation details (if any) , the effect it has had on you or your friends and any lessons for devs and/or Nintendo if any.

[TheLastStarFighter]

Blops2 - I've played it a tonne. Ghosts is good, but not quite as good. These games also compliment Nintendo 1st party well.