Simple operation underwater exploration action! Explore and uncover the dark depths of the ocean.

Go to the bottom of the bottomless ocean to collect resources.

Simple operation underwater exploration action!

A small resource extraction base built in a certain sea area in a world where there is only ocean.

There, you will play the role of a novice "mariner" who will explore the deep and complex ocean to collect undersea resources.

It's the Mariner's job to take care of limited air, fight sometimes terrifying monsters, and bring back a container full of resources.

Exchange the resources you bring back for money or use them to strengthen your aircraft and prepare it to explore deeper into the ocean.

Can you find new weapons and special abilities from items you pick up in the sea?

Explore and uncover the dark depths of the ocean.