Nobunaga's Ambition: National Version is a 1986 historical strategy game by Koei, the second in the Nobunaga's Ambition series. Set in Japan's Sengoku period, players take on the role of a feudal lord aiming to unify the nation through strategy and combat. Manage domains, develop the economy, train armies, and engage in diplomacy or war with rival lords. Choose from four unique campaigns with distinct historical challenges. Originally released for the PC-8801, it was later ported to platforms like the NES, Sega Genesis, and Super Nintendo. Its 1988 NES release marked Koei's first home console entry. Music by Yoko Kanno enhances the immersive historical atmosphere. As the series' second installment, it introduced key gameplay improvements that shaped future titles.