Mary Skelter Finale is a role-playing game that takes place in an underwater city, where players control a group of characters known as the "Dust" who are tasked with rescuing their friends from monsters that have taken over the city.
The gameplay involves exploration, combat, and character development. Players can recruit new members to their party, each with unique abilities and strengths. The game features a dynamic battle system that allows for strategic team management and skill combination. As players progress through the story, they uncover more about the history of the underwater city and the secrets behind the monsters.