When you get lost on a deserted island, the thing that makes you most happy is to meet a passing boat. It is the only and greatest hope for you to return to your family, to the human world. But, what about the boat that landed on the island belonged to a person in need of a search? The reunion is sure to be one of the most tortuous situations a person can encounter in life. What would you do in this situation? Please try to save everyone’s life. Idle Arks: Build at Sea simulates exactly what you will encounter when you have to float on a boat and try to live at sea.