Tenchu: Wrath of Heaven (2003)

Move like a shadow. Strike like a snake. After amassing an army of ninjas and lords of darkness, the mysterious Tenrai has begun a quest to conquer 16th-century Japan. Now your master, Lord Gohda, has called upon you - a cunning stealth assassin - to stop Tenrai and his disciples before all is lost. Live by honor. Kill by stealth.