Splatoon

Splatoon is a third-person shooter video game franchise created by Hisashi Nogami and Shintaro Sato and developed, published and owned by Nintendo. It is set far in the future on a post-apocalyptic Earth that has been repopulated with evolved marine life and centers around a pair of humanoid races derived from cephalopods known as Inklings and Octolings—squids and octopuses respectively—which can morph between humanoid and cephalopodic forms at will. They often engage in "Turf War" battles with each other and use a variety of weapons that produce and shoot ink while in their humanoid forms or swim through and hide in solid surfaces covered in their own ink while in their cephalopodic forms.