Samurai Warriors is the first title in the series of hack and slash video games created by Koei's Omega Force team based closely around the Sengoku period of Japanese history and it is a sister series of the Dynasty Warriors series, released for the PlayStation 2 and Xbox in 2004. A port of this game called Samurai Warriors: State of War has been released for the PlayStation Portable, which includes additional multiplayer features.

Samurai Warriors 2 is a sequel to the original Samurai Warriors, created by Koei and Omega Force. The game was released in 2006 for the PlayStation 2 and Xbox 360, and ported to Microsoft Windows in 2008. Like the Dynasty Warriors series, an Empires expansion was released as well, and an Xtreme Legends expansion followed on in August 2007, in Japan. The game, alongside its two expansions, Xtreme Legends and Empires also receive a HD-enhanced port for PlayStation 3 and PlayStation Vita under the name Sengoku Musou 2 with Moushouden & Empires: HD Version.