Diluvian Winds is a game set in a world where the weather is becoming increasingly extreme. Players take on the role of a walrus lighthouse keeper who welcomes travelers seeking refuge. As the keeper, you must accommodate these travelers and fulfill their requests to withstand natural disasters while developing the hamlet on land, underwater, and in the air.

The personality and type of each monster girl affect their dialogue, skills, abilities, and preferences for gifts and training. Understanding and utilizing the different strengths and weaknesses of your monster girls in battle is a key aspect of the game.