If anyone here has the Wii U, would highly recommend you to play Super Mario 3D World if you haven't already, shame on you!
It's excellent, 4 player awesome packed co-op fun, but again me and my brother played some of it as two players and it was probably the best option, 3 at a push!
I LOVE multiplayer mario games
I always have loved the marioparty games, minigames, mario kart etc, just so much craic playing with other people!
Mine has got to be Batman Arkham Knight, maybe even something like Mario Kart 8 would be awesome (the lil bro will get it, since he has the Wii U, not me >.<)