The player must earn money in order to become the wealthiest gambler in the world. The game, set in New York City, is considered a spin-off from the Pachio-kun franchise. In this casino game, there is a choice of two game modes: "game" and simulation. In the simulation mode, the player controls a pachinko ball named Pachio-kun, who walks directly into a casino where he can exchange money for tokens and try his luck at the slot machines. In the "game mode", he is brought in a helicopter onto a top-down "world map" area. He is told that this is Brooklyn, New York, and begins to roam the area, gradually gaining access to different casino houses. There are also random encounters, during which he is able to bet some money and directly operate a slot machine from the world map.