The Aquatic Adventure of the Last Human is an arcade platformer in a post-apocalyptic setting. The events of the game take place in the distant future, where life is preserved in a few underwater cities. After a long space journey, the main character returns to Earth. Seeing that life on the planet has changed greatly, he tries to find survivors and, at the same time, figure out why life on the surface has declined. Players will explore the rich underwater world, collect useful items and fight monsters from the depths.