Play as an Octoling for the very first time in this large-scale downloadable content for the Splatoon™ 2 game! This full-on single-player adventure spans 80 missions starring Agent 8, a new character who awakens without her memories on a dark subway platform. Navigate this mysterious underground test facility in a desperate battle to reach the surface of Inkopolis. Escape from these twisted depths, and you’ll finally be able to join multiplayer* matches as an Octoling! You may think you know everything about the world of Splatoon, but these waters run deep, and so does the lore.

More details on the official game page of Splatoon™ 2: Octo Expansion ...