Onimusha: Warlords, known in Japan as Onimusha (Japanese: 鬼武者), is an action-adventure hack and slash video game developed and published by Capcom for the PlayStation 2. The first entry of the Onimusha series, it was originally released in 2001. An updated form as Genma Onimusha for the Xbox was released in 2002. The original Warlords version was ported to Microsoft Windows, although it was only available in China and Russia. A remaster for Nintendo Switch, PlayStation 4, and Xbox One was released in 2018, with a Windows version following in 2019. 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. After Nobunaga's death in battle, Samanosuke goes on a quest to save Princess Yuki from demons working alongside Nobunaga's forces. The player controls Samanosuke and his partner, a female ninja Kaede, in their fight against demons. While the game borrows elements from Capcom's own Resident Evil survival horror series, such as solving puzzles and a fixed camera, the game is focused more on the action game genre with Samanosuke possessing multiple weapons that can be upgraded by defeating several enemies. Capcom originally wanted to release the game for the original PlayStation but the close release of its next generation version resulted in the project being scrapped. Following its release, Onimusha: Warlords achieved high popularity, becoming the first PlayStation 2 game to reach one million sales. Its sales eventually surpassed two million units worldwide. The game has been well-received by video game publications and has been recognized as one of the best titles on the system. It was followed by two direct sequels for the same console and another three games within the franchise.