- Achievements
Do the following things to obtain the corresponding Gamerscore points:

20 Points
50 Stealth Kills	Overcome 50 enemies with Stealth Kills.
Finish 5 Missions	Finish 5 missions.
Finish 10 Missions	Finish 10 missions.
20 Stealth Kills	Overcome 20 enemies with Stealth Kills.
30 Ninja 5 ranks	Finish 30 missions with Ninja 5 rank.
10 Ninja 5 ranks	Finish 10 missions with Ninja 5 rank.
30 Points
300 Stealth Kills	Overcome 300 enemies with Stealth Kills.
Ninja 5 All Easy Missions	Finish all easy missions with Ninja 5 rank.
Finish 30 Missions	Finish 30 missions.
100 Stealth Kills	Overcome 100 enemies with Stealth Kills.
Finish 20 Missions	Finish 20 missions.
50 Ninja 5 ranks	Finish 50 missions with Ninja 5 rank.
500 Stealth Kills	Overcome 500 enemies with Stealth Kills.
40 Points
Finish 40 Missions	Finish 40 missions.
Ninja 5 All Normal Missions	Finish all normal missions with Ninja 5 rank.
700 Stealth Kills	Overcome 700 enemies with Stealth Kills.
50 Points
Finish 50 Missions	Finish 50 missions.
Ninja 5 All Hard Missions	Finish all hard missions with Ninja 5 rank.
1000 Stealth Kills	Overcome 1,000 enemies with Stealth Kills.
Finish the game story	Finish Story mode.

20 Points
Finishd 1 Secret Mission	Finishd 1 Secret Mission.
Finishd 2 Secret Mission	Finishd 2 Secret Mission.
Killed 10 Tomikichi	Killed 10 Tomikichi.
Killed 5 Tomikichi	Killed 5 Tomikichi.
30 Points
Killed 20 Tomikichi	Killed 20 Tomikichi.
Finishd 3 Secret Mission	Finishd 3 Secret Mission.
Killed 30 Tomikichi	Killed 30 Tomikichi.
40 Points
Finishd 4 Secret Mission	Finishd 4 Secret Mission.
Killed 40 Tomikichi	Killed 40 Tomikichi.
50 Points
Finishd 5 Secret Mission	Finishd 5 Secret Mission.
Killed 50 Tomikichi	Killed 50 Tomikichi.

- Special Costumes
Kill 50 Tomikichi to unlock the Special Costumes, which include the Lion Costume (face), Hotdog (sheath), and Kite and Flag (accessory).

- Alternate costumes
Successfully complete the game on the Normal difficulty setting to unlock the Modern Army, Foreign Set 1 (white), Foreign Set 2 (green), Foreign Set 3 (forest camo), and Foreign Set 4 (winter camo and red) costumes.

- Overcomeing the Boss in Daylight Battle On Deck mission
You will meet this Boss two times. You can defeat him easily by knocking him into a body of water. Water seems to instantly kill all enemies.

- Getting 'Ninja 5' rank in Pursuit Of Echigoya mission
This is the hardest level in the game to get this rank. As soon as you gain control of your character, jump to the left-most buildings. Walk along them until you see an innocent man. When he waves and turns around to walk away, jump down and grab the guard below. Kill him, then jump on the building to your left, staying to the left of Echigoya. Once you reach the end of the rooftop, there should be a man below you. Kill him, then jump on to the building in front of you with Echigoya turning right to go down a street. Run along the rooftop and jump to the building to your right. Sit here and watch as a Tomikichi walks past Echigoya. Notice: Tomikichi are the men that wear the basket hats. Once Echigoya walks away, watch the innocent person up and to your right. Wait for him to turn. If you jumped down and killed the Tomikichi when he was turning, he will spot you and walk over. Once he turns, jump down and kill the Tomikichi. Next, walk back toward Echigoya and jump on the fence to your left and onto a rooftop, A man will walk into view below you. Jump down and kill him, then run down the alleyway there. Stop at the first opening to your right. Jump up onto the roof and go to the top to rebegin the timer. Then, jump down to your left and another man will be there. Kill him, then climb the building you where on before to rebegin the timer. Next, jump over the wall to your left and wait. You will end up with about 00:03:00 when doing this, but it is possible. Wait and Echigoya will get disturbed, seeing the dead body you killed a few moments ago. He will run. Walk to the left and you should see two guards. Wait until the enemy to your left moves closer to you, then kill him. It is easier if you have the Badger ability. Once he is dead, run down to the end of this street avoiding the Tomikichi, and jump on the building to your right to reset the timer. Sit on this roof and wait until Echigoya passes. When he does, the Tomikichi should move past him. Drop down and kill him. Once he is dead, jump back on the roof that you were sitting on, then jump to the building across from it. Make sure you are following Echigoya. Once you catch up, you should be behind a building. Drop down and run to the last building, staying behind it. The last enemy will walk to this building. Run out and kill him, then run and jump onto the wall in front of you or to your left, and jump onto the building. Echigoya will spot a dead body and begin to run. Follow him. You may also need to kill the dog. The dog is in the alleyway close to where you killed the second person at the beginning. Once you jump to the next building and crawl to the gate, just sit there to complete the mission. Notice: The requirements necessary to get a 'Ninja 5' rank are you cannot be spotted by any one, and you must kill all the enemies (eight in this mission, may also include the dog).

- Get on top of map in daylight battle on deck
First, kill every person on the map. Then, go to the top right corner of the map (the stairs leading to the mansion). At the top of the stairs, turn right. You will see the spiked fence. Long jump towards it. Keep pushed RB and move all the way to the right. Notice: You must have at least tier one of the Wall skill. When you wall run all the way to the right, you will be standing in mid-air. Do not move or you will fall back down. Keep pressing Jump until the sky turns back. You can now walk around on top of the map.

- Victory celebration
After completing a mission, keep pushed D-pad Up, Down, Left, or Right before the 'Mission Finishd' screen appears to do one of four alternate victory poses.

- Lurk and Feet abilities
Get 1,000 Stealth Kills to unlock the Lurk and Feet abilities.

- Upgrading abilities
When you defeat the Boss in the Daylight Battle On Deck mission and the final mission, you will get an ability boost to your main abilities. It boosts by 20 each time.

- B-sword
The B-sword is a purchasable item which makes your entire sword black except the blade itself, which remains silver when the item is equipped. It never breaks and you only have to buy it once. You can draw your sword with no effect to your visibility. This is a must buy item.