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 in the far 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 frequently 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.

The first game in the series, Splatoon, was released for the Wii U on 28 May 2015. A sequel, Splatoon 2, was released for the Nintendo Switch on 21 July 2017, followed by an expansion pack, Octo Expansion, on 13 June 2018. A third game, Splatoon 3, was released on 9 September 2022, followed by an expansion pack/DLC, Side Order, on 22 February 2024. A spin-off game titled Splatoon Raiders was announced on 10 June 2025, as an exclusive for the Nintendo Switch 2. The series has received positive reviews for its style, gameplay mechanics and soundtrack, with the first two games in the series having been nominated and awarded several year-end accolades from various gaming publications. The series has sold over 30 million copies.