1) Xenoblade Chronicles X --> 99:04
2) Mario Kart 8 --> 92:56
3) Hyrule Warriors --> 51:46
4) Super Smash Bros. ---> 38:10
5) Super Mario 3D World ---> 33:46
Actually I might add some hours to other games, because I play some of them in my friend's house. So, Splatoon might be around 100 hours, and MK8 and Smash around 200 hours estimate.