Hanafuda Yūkyōden: Nagarebana Oryū is a puzzle game released by Hacker International in 1991 for the Nintendo Entertainment System (NES). Centered on traditional Japanese hanafuda cards, it requires strategy and skill to play. Notably, it includes erotic images unlocked by winning. Due to its explicit content and unlicensed release, it lacked official approval but gained a cult following among certain players.