[6] The player controls a young girl, Miku, as she explores an archipelago of half-sunken buildings, climbing ruins and traversing the spaces between using a rowboat.

Miku and her younger brother Taku drift into a city partially submerged beneath ocean water with only the tallest buildings protruding from the sea.

Taking refuge in the top of a clock tower, Miku begins to explore the city in her motorized fishing boat in search of supplies to treat Taku.

Additional inspirations included a Grand Theft Auto IV mod that submerges the game's Liberty City in water.

The director Ed Orman said: "It was unintentional at the beginning, but the setting we’ve chosen is pretty topical with global warming, sea levels rising and people ignoring that problem.