The extinction of humanity in the lore of the game is attributed to the effects of global warming. And a fossilized gamer with a Wii U is seen in the Sunken Scro—wait, why is there a fossil of someone playing a Wii U? How did that even happen??? "Oh, I'm just gonna play some Splatoon today next to this giant mud pit in the middle of nowhere, totally not dangerous at all~... Oh, oops! I fell."