Players control Dave, a deep sea diver who is talked into managing a sushi restaurant and supplying it with the fish they need. He fishes at a spot called the Blue Hole whose geography and fauna change daily. Players can collect resources to upgrade or craft new items for Dave to use, such as diving gear and weapons to use in boss fights against giant underwater creatures.[3] Dave's air supply is decreased faster as he becomes overburdened, and he becomes more susceptible to predators, such as sharks. Being defeated in combat causes Dave to drop all his cargo except one item as he is rescued.[4]

Dave is also asked by others to perform various favors for them involving exploration, research, or finding rare items. As players retrieve items lost at sea, they can use Dave's contacts in his cell phone to find buyers. Dave can go diving twice a day, during morning and afternoon.[3] In the evening, he manages the sushi restaurant. Players can unlock new recipes to cook, attract influential customers, renovate the restaurant and add new decorations, hire new employees, and more.[3] An in-game app called "Cooksta" keeps track of the restaurant's popularity and rating and can unlock further upgrades. The graphical style uses pixel art.[5

свернуть