Splatoon 2 is a 2017 third-person shooter game developed and published by Nintendo for the Nintendo Switch. It was released on July 21, 2017 and is a direct sequel to Splatoon, which includes a new story-driven single-player mode and various online multiplayer modes. An expansion pack for the single-player mode titled Octo Expansion was subsequently released as downloadable content (DLC) in June 2018.

Like its predecessor, Splatoon 2 is a third-person shooter in which players control characters, known as Inklings and Octolings, and use colored ink as ammunition. Ink is also used to cover the ground, or any paintable surface, in order to swim or refill their ink tanks. Inklings and Octolings can morph between humanoid, or kid form, where they switch from walking and shooting, into squid form where they can quickly swim through ink of their own color, and replenish their ink supply, as well as return to full health.