Sengoku was developed and published by SNK, released for the Neo Geo MVS arcade system on February 12, 1991, as a side-scrolling beat ’em up set in a fantastical version of Japan’s Sengoku period. Players fight through waves of undead samurai, ninja, and other supernatural enemies raised by an evil sorcerer, using standard punches and kicks alongside a distinctive transformation mechanic that let characters temporarily shift between three different time-period forms, a feudal-era warrior, a present-day soldier, and a futuristic cyborg, each granting different weapons and attack styles mid-stage. That time-shifting gimmick gave Sengoku a genre-blending identity distinct from more straightforward contemporaries like Capcom’s Final Fight, mixing historical Japanese folklore imagery with science-fiction elements in a way few other beat ’em ups of the era attempted. Its atmospheric, horror-tinged art direction and unusual core mechanic helped it stand out in SNK’s early Neo Geo library, and its reasonably positive reception led directly to a sequel, Sengoku 2, a couple of years later, along with several further installments across the following decade.