Irem had a long series of pachislot simulators with licensed pachislots. The weird thing is the last few were made in the Steambot Chronicles engine, with loads of sandbox stuff included. It's all set to a story set in a world where people obsess over pachinko like people in Yugioh obsesse over duel monsters, having life or death battles of it. Like Irem's other games you can choose wildly inappropriate (asshole, and pervert among others.) dialog options.