I must say, I really didn't expect XCX to win by such a large margin, I forecast Splatoon or Smash or Mario Kart to take poll position. (Badum tssss)

Well, the race ain't over yet, and both games have a podium spot right now. And maybe there's a spiny blue shell lingering around...

I'll say Pikmin 3

XCX is such a time waster that allows me to grind every piece of hardware and multiple characters, and this me coming off playing Devil Survivor 2: Record Breaker, I love it. It is my favorite Wii U game.

Honestly but I can't say it is the best, easily one of the best and probably one of the best technical game Nintendo has put out in years, But you have strong entries like Splatoon, Mario Kart 8, Super Smash Bros, Super Mario 3D World, Bayonetta 2 and others that could easily take the crown depending on your preference of game.

I'd say XCX, pretty great game overall and it will definitely keep you busy for a long time too.

As others have said probably XCX. Hard to believe the system is over three years old now...

ACIV. I know I know but it is my most played game single player.... I enjoyed it so much I even went and bought it again on PS4.