The player controls Samanosuke and his partner, a female ninja Kaede, in their fight against Demons. After Nobunaga's death in battle, Samanosuke goes on a quest to save Princess Yuki from demons working alongside Nobunaga's forces. The game's plot is set in the Sengoku period and focuses on the samurai Samanosuke Akechi who fights against the forces of Nobunaga Oda.
A remaster for Nintendo Switch, PlayStation 4, Xbox One and Windows via Steam was released in January 2019. The original Warlords version was also ported to Microsoft Windows, although it was only available in China and Russia. An updated form as Genma Onimusha (Japanese: 幻魔 鬼武者 ) for the Xbox was released in 2002. Onimusha: Warlords, known in Japan as simply Onimusha (Japanese: 鬼武者 ), is an action-adventure video game and the first entry of the Onimusha series, released for the PlayStation 2 in 2001.