Mario Kart 8
Super Mario 3D World
New Super Mario Bros. U

No 3rd party games.

First Party
Wonderful 101
Wind Waker HD
Super Mario 3D World
New Super Mario Bros U
Donkey Kong Country:Tropical Freeze
Wii Party U
NintendoLand
Mario Kart 8

Third Party
Assassins Creed 3
ZombieU
Madden 13($8 New at Toys R Us)

1 1st party physical release, 2 3rd party digital releases.

That's all I got on my Wii U.

Nintendo Land's been simply too good and Knytt Underground too long for me to need anything else.

Mario Kart will bring with it Pikmin 3, though, and then the ratio will be back in Nintendo's favor.

Assassin's Creed III
Batman: Arkham City
Call of Duty: Black Ops II
Darksiders II
Injustice: Gods Among Us
Just Dance 4
LEGO Batman 2: DC Super Heroes
LEGO City: Undercover
Monster Hunter 3: Ultimate
Need for Speed Most Wanted (2012)
New Super Mario Bros. U
Nintendo Land
Resident Evil: Revelations
The Legend of Zelda: The Wind Waker
ZombiU
Assassin's Creed IV: Black Flag
Call of Duty: Ghosts
Deus Ex: Human Revolution - Director's Cut
Just Dance 2014
NBA 2K13
New Super Luigi U
Pikmin 3
Rayman Legends
Scribblenauts Unmasked
Sonic: Lost World
Super Mario 3D World
Tom Clancy's Splinter Cell: Blacklist
The Wonderful 101
Donkey Kong Country: Tropical Freeze
Mario & Sonic at the Olympic Winter Games Sochi 2014
Tekken Tag Tournament 2
The Amazing Spider-Man 2
Mario Kart Wii U

9 first party. 20 third party. (That's with me treating w101 as third despite it being a Nintendo owned ip)

3rd Party

Assassin's Creed III
Batman: Arkham City Armored Edition
Monster Hunter 3 Ultimate
Warriors Orochi 3 Hyper
Ninja Gaiden 3: Razor's Edge
ZombiU
Need for Speed: Most Wanted U
Injustice: Gods Among Us
The Wonderful 101
Tom Clancy's Splinter Cell: Blacklist
Batman: Arkham Origins
Assassin's Creed IV: Black Flag
Disney Infinity
Sonic & All-Stars Racing Transformed
Your Shape: Fitness Evolved 2013
Toki Tori 2+
Nano Assault NEO
Trine 2

Deus Ex: Human Revolution

1st Party

New Super Mario Bros. U
Nintendo Land
Pikmin 3
The Legend of Zelda: The Wind Waker HD
Super Mario 3D World
Wii Fit U
NES Remix 1
Mario Kart 8

Third Party 19 : First Party 8

3rd Party stands for Third Party Developer and not Third Party Publisher or Third Party IP Owner. So The Wonderful 101 is 3rd Party.

First Party: 3D World, Pikmin 3, New Super Mario Bros U, Pikmin 3, Wonderful 101, Wind Waker HD, Lego City Undercover ( not sure if this is 1st party)
Third party: Rayman Legends, ZombiU, Sonic Lost World, Sonic Racing Transformed, Tekken Tag Tournament 2, Monster Hunter, Darksiders 2

When they own the IP but have a third party develop it we call it 2nd party ^^

I wonder what we'd call Bayonetta 2. They technically own the rights to the second title, but don't actually own the series IP. That's like 2.5th party xD

First party:
The Wind Waker HD
Super Mario 3D World
NSMBU
Mario Kart 8

No third party games.

I own nine games published by Nintendo and seven games published by third parties...
If it wasn't for my boyfriend, I would actually only have four third party games...