More info on IGDB

Pachi Slot Kanzen Kouryaku 4 - Universal Koushiki Gaido Vol.4 is a pachi-slot (gambling machine) game that features 5 different gambling machines and different levels of zoom. The 5 machines are Rainbow Quest, Skull Heads, B-Max, 10TacleS & Wolf-M. Are based on the arcade slot machines of the same names released by Aruze. The game also features the Hall Master mode in which the player is the owner of a pachinko store and he can choose the machines and the prizes and try to win money with the gamblers that play in his machines.