is a third-person shooter video game franchise created by Hisashi Nogami and Shintaro Sato, and developed and owned by Nintendo. Set in the far future on a post-apocalyptic Earth inhabited by anthropomorphic marine animals, the series centers around terrestrial cephalopods known as Inklings and Octolings – based on squids and octopuses respectively – which can transform between humanoid and cephalopod forms at will. They frequently engage in turf war battles with each other and use a variety of weapons that produce and shoot colored ink while in humanoid form, or swim through and hide in solid surfaces covered in their own colored ink while in their cephalopodic forms.
The first game in the series, Splatoon, was released for the Wii U on May 28, 2015. A sequel, Splatoon 2, was released for the Nintendo Switch on July 21, 2017, followed by an expansion pack, Octo Expansion, on June 13, 2018. A third game, Splatoon 3, was released on 9 September 2022. 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 28 million copies.
Splatoon has spawned numerous collaborations with third-party companies and established its own esports tournament circuit in 2018. It has spawned a manga series as well as holographic music concerts in Japan.
"Splatfests" are special, recurring in-game festival events that take place in the games, where players are asked a question and pick a team based on the answer that they chose. For example, players could be asked to pick between mayonnaise or ketchup, or if they prefer using a fork or a spoon. Similarly to the first game, Splatoon 2 features Splatfest events that include crossovers with other brands, both from other Nintendo properties such as Super Smash Bros. Ultimate and Super Mario, and third-party franchises including Teenage Mutant Ninja Turtles, McDonald's, Uniqlo, Nike, Sanrio, Meiji, Pocky, and NPB.