If you thought Splatoon was a $20 e-shop game and would flop

[the_dengle]

jigokutamago said:

Teach them the valuable lesson of sharing.

Not to defend Splatoon, because it really should have some better local options, but I used to play single-player games with my sister all the time. Taking turns is a valid form of local multiplayer, depending on the type of game.