Mission 2--Gohda Castle
Echigoya's last words were as informative as they were deadly. There is a traitor within the castle of Lord Gohda--a man wearing glasses and named Hamada. You must dispose of the traitor and return to Lord Gohda. But be careful. Gohda's guards do not know of your existence, and they will greet you as an intruder. You must not kill any of Gohda's guards.
Execute Hamada and Return to Lord Gohda!
Objectives: Hamada is on the first floor. Do not kill Gohda's guards. Proceed with silence and caution.
Turn left and cross the room. Snag the smoke bomb in the room's corner. Drop down into the large hole and search the box for a ninja rebirth. Go right and peer outside into the alleyway. There's a guard that patrols the far side. Wait until he's gone, then drop down and leap into the first room on the right. Another guard patrols here. Wait until he moves around you. Go past him until you drop down into another alley. Turn left and enter the first room on the right. It's Hamada. Approach him to automatically kill him.
Search the room for a health power-up and grab the key left behind by Hamada. There's a secret passage in the back of Hamada's room that lets you bypass this section of enemies. Take the passage or head outside to earn some stealth kills.
You're now free to kill the guards--now ninjas. Crouch and quietly approach the room's exit. Move until the door opens, then spot the ninja's location outside. Wait for an opportunity to sneak up on him for a stealth kill. Go right until you can peer down a left hall. Terminate this ninja with a stealth kill. Go down this hall and peer around to the left. Another ninja patrols this exterior area. Wait until he moves away and terminate him.
Crouch and duck under the structure on the right. Move until you automatically stand up. Here's the locked door. Stand below the door and use the key. Duck quickly because there's a ninja inside. Wait for him to move away, then hop inside and eliminate him.
Go up the staircase. There's a ninja at the top and to the right. Wait for an opportunity, and then eliminate him with a stealth kill. Follow the walkway and reach a room with another ninja. Peer around the corner and terminate the ninja with a stealth kill. Search the room across from this area for a health power-up. Return and cross the room. Descend the staircase in the far corner.
Look out for a guard in the first alcove on the left. Search right--here's where the secret passage from Hamada's room led. Continue through the corridor and encounter another ninja patrolling a larger room. Cross the room and terminate another guard in the far hall. Go up the next staircase and through the door on the left. There's a guard on the far side of the room. Wait until he moves away, then terminate him with a stealth kill. Continue through the only available corridor and eliminate the ninjas encountered along the way. When you reach the exterior balcony (the overlook is to your right), you're almost to the stairs. Descend the staircase. Maneuver through the brightly lit corridor until the mission concludes.