Day of the Shell is a tactical roguelike where strategic decisions and their consequences are executed with one click per turn. In this world, the deities have unleashed their power, leaving behind only a network of remote islands surrounded by water. The main character is a lone monster hunter, armed with a revolver and pursuing a clear goal. Traveling through a fractured world, she intends to challenge the entities that caused the cataclysm. Moving forward requires the player to carefully plan and manage resources.