Ninja Gaiden II was initially released for the Xbox 360, marking a significant entry in the Ninja Gaiden series by Team Ninja and Tecmo.
Ninja Gaiden Sigma 2, an enhanced port of Ninja Gaiden II, was released for PlayStation 3 featuring improved graphics, new gameplay mechanics, and additional content.
Ninja Gaiden Sigma 2 Plus, a further enhanced version optimized for PlayStation Vita, was released. It included new playable characters and other added features, expanding the game's accessibility to handheld players.
Ryu Hayabusa infiltrates the enemy fortress to rescue the captured government agent, Irene Lew, who holds key intelligence about the looming Mist Incident.
Ryu confronts members of the Mugen Kage Clan, an elite group of ninja assassins aligned with the Shadow Clan, revealing deeper conspiracies behind the Mist Incident.
An ancient Mist envelops the city and its surroundings, causing widespread chaos and awakening demonic forces.
Ryu faces Vazdah, the powerful archdemon responsible for unleashing the Mist and threatening the world.
Ayane, a skilled kunoichi from the Mugen Tenshin Clan, joins forces with Ryu to combat the growing threat of the Mist and the Shadow Clan.
Ryu and his allies infiltrate and destroy the main base of the Shadow Clan, disrupting their operations and weakening their grip on the Mist Incident.
Details of the Rapha Incident, a shadowy event connected to the Mist outbreak and genetic experiments, come to light.
Ryu reunites with fellow Dragon Ninja Momiji, who aids him with valuable insight and support during his quest.
