Join CIA Agent Irene Lew as she explores a mysterious facility hidden in the middle of nowhere. Things take a thrilling turn when she's confronted by Ryu Hayabusa, the game's hero, who warns her that no one who discovers this place will survive. As the chase leads to a cliff, the ground crumbles beneath Irene, sending her tumbling to what seems like her doom. Ryu, puzzled by these events, believes someone is impersonating him. Determined to uncover the truth, he infiltrates the facility, battling through waves of robotic foes. His journey brings him face-to-face with the fearsome Mantis Warrior, a heavily armored android with a hidden flamethrower. After defeating this mechanical menace, Ryu meets a mysterious young man named Clancy. Clancy provides Ryu with a crucial lead, directing him to the "Castle Rock Fortress" and warning that traps await him there. Get ready for an action-packed adventure full of twists and challenges!