Water World is an action casual game set in a post-apocalyptic ocean where climate change has led to rising sea levels and the emergence of powerful sea monsters known as 'Sea Kings.' Players customize and upgrade various ships to combat these formidable foes while navigating treacherous waters. The game emphasizes strategic planning as each ship possesses unique abilities that can be combined for effective combat.

As players engage in battles against the Sea Kings, they can collect valuable resources such as food, oil, and renewable minerals. These resources enhance ship capabilities and unlock new weapons and armor. With a variety of quests and challenges available, players can team up with friends to defeat powerful enemies or compete to become the ultimate battle captain in this thrilling ocean adventure.