Skip to content
Part 57
Ninja Gaiden 4

Part 57

Complete Ninja Gaiden 4 Part 57 walkthrough covering the Fissure, Dworku Moats, and Junction Chamber, including how to get the Oxygen Cylinder and Triton Key.

By ···10 min read·Multi-source verified
1 reading this guide  

Complete Ninja Gaiden 4 Part 57 walkthrough covering the Fissure, Dworku Moats, and Junction Chamber, including how to get the Oxygen Cylinder and Triton Key.

Walkthrough
  1. 1
    Swim out of the cavern via the underwater tunnel and emerge into the Fissure area.
  2. 2
    Jump out of the water and approach the Triton Door on the dry ledge.
  3. 3
    Defeat all Stinkfish mermaids and Green Fish.
  4. 4
    Swim UNDER the metal bars opposite the Triton Door to find an open gap.
  5. 5
    Swim through the gap and emerge near a sunken ship.
  6. 6
    Destroy the Laser Copters with the Windmill Shuriken.
  7. 7
    Jump onto the ship deck, access the Crank Handle, and turn it to open a door under the ship.
  8. 8
    Dive into the water and swim towards the large open hole at the back of the ship.
  9. 9
    Swim towards the chest in the middle and open it to obtain the OXYGEN CYLINDER, allowing indefinite underwater breathing.
  10. 10
    Swim UPWARDS from the chest to find another chest containing the TRITON KEY.
  11. 11
    Collect GOLDEN SCARAB #38 next to the Triton Key chest.
  12. 12
    Swim to the underwater tunnel you emerged from to find GOLDEN SCARAB #39.
  13. 13
    Swim through the underwater zigzag path under the large ledge (with the Triton Door) to find a chest containing a Life of the Gods (LIFE OF THE GODS #29).
  14. 14
    At the end of the zigzag path, a chest contains a Talisman Of Rebirth.
  15. 15
    Return to the dry ledge, use the TRITON KEY on the Triton Door, and exit to the Dworku Moats.
  16. 16
    In the Dworku Moats, swim towards the large open gap under the water.
  17. 17
    Swim through the caverns to emerge back into the Tomb Of Eons area.
  18. 18
    Optionally, exit the water to access Muramasa's Statue to replenish stock.
  19. 19
    Dive back into the water and swim through the next open gap into another cavern.
  20. 20
    At the end of the cavern, swim DOWN towards the Chamber of Everlasting Sleep.
  21. 21
    Inside the Chamber of Everlasting Sleep, swim up towards the roof to find GOLDEN SCARAB #40.
  22. 22
    Swim through the Skull Door path to emerge back into the flooded chamber with the elevator.
  23. 23
    Swim towards the elevator and go up to the Monk's Room.
  24. 24
    After exiting the elevator, defeat the BS Ninja ambush.
  25. 25
    Approach the broken desk to find another safe combination.
  26. 26
    Open the safe to obtain the JEWEL OF THE DEMON SEAL.
  27. 27
    Take the elevator back down to the underwater area.
  28. 28
    Swim to the Junction Chamber and use the Save Point to SAVE your game.
  29. 29
    Take the nearby platform up to Zarkhan Stadium to prepare for the boss battle against Doku.
  30. 30
    (Chapter 14 begins) Use the Save Point and SAVE your game.
  31. 31
    Make your way past Great Bridge Square towards the alleyway Doku passed through.
  32. 32
    Defeat the Zombified Soldiers using downward wall strikes, counterattacks, and an Ultimate Technique (UT).
  33. 33
    Approach the first building with a cracked door and bust it open.
  34. 34
    Open the chest inside for a goodie.
  35. 35
    Make your way to the large building with the glowing portal.
  36. 36
    Before entering the portal, find a chest in the corner containing essence.
  37. 37
    Teleport through the portal.
  38. 38
    Run down the hill in Hayabusa Village towards the Save Point.
  39. 39
    Access Muramasa's statue to replenish stock and SAVE your game.
  40. 40
    Optionally, participate in an Enemy Ambush before proceeding.
Tips
  • Use the Windmill Shuriken to destroy Laser Copters.
  • Run-And-Shoot tactics are effective against Stinkfish mermaids.
  • Hard combos are recommended for defeating BS Ninjas.
  • Doku will have Samurais assisting him on Hard Mode.

100% Human-Written. AI Fact-Checked. Community Verified. Learn how AntMag verifies content