Popular Wii U Online Multiplayer games?

-Mario Kart 8 (2-12 player Co-op & Vs)
-Smash bros Wii U (2-8 vs)
-Resident Evil Revelations (2 Co-op)
-Mass Effect 3 SE (2-4 Co-op)
-Monster Hunter 3 Ultimate (2-4 Co-op)
-Call of Duty Black Ops 2 (2-18 Co-op & vs)
-Call of Duty Ghosts (2-12 Co-op & vs)
-Tekken Tag 2 Tournament WUE (2-4 Co-op & vs)
-Injustice God's Among Us (1v1 vs)
-Mario & Sonic at Sochi Olympics (2-4 vs)
-Sonic All Stars Racing (2-8 vs)
-Assassin's Creed 3 (2-8 vs)
-Assassins Creed 4 black flag (2-8 vs)
-Splinter Cell: Blacklist (2-8 Co-op & vs)
-Need For Speed (2-6 vs)
-Fifa 2013 (2-5 Co-op & vs)
-Warriors Orochi 3 Hyper (2 Co-op & vs)
-Hyrule Warriors (2 co-op)
-Ninja Gaiden 3: Razor's Edge (2-8 Co-op & vs)
-Disney Infinity (2-4 Co-op)
-Madden 2013 (1v1)
-NBA 2k 2013 (2-10 Co-op & vs)
-007 Legends (2-12 Co-op & vs)
-Splatoon (hasn't been released yet but has multiplayer. Look up trailers)

Eshop
-Doctor Luigi (1v1)
-Fist of the North Star 2 (2- 8 Co-op & vs)
-Wii Sports Club - Tennis,Bowling & Golf (2-4 Co-op & vs)
-Trine 2 (2-3 Co-op)
-Dungeons & Dragons (2-4 Co-op)
-Castle Storm (2 Co-op & vs)
-Pure Chess (1v1 vs)

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There are more games but you'll need to look it up.