Skip to content
| Egg Corridor [sect103] |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Cave Story

| Egg Corridor [sect103] |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

A complete walkthrough for the Egg Corridor section of Cave Story, detailing how to find the ID Card, obtain Ze Missiles, and defeat the boss, Igor.

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

A complete walkthrough for the Egg Corridor section of Cave Story, detailing how to find the ID Card, obtain Ze Missiles, and defeat the boss, Igor.

Walkthrough
  1. 1
    Immediately jump down into the bottom tunnel to grab a Life Capsule. Avoid the white spikey projectile.
  2. 2
    Head right, defeating enemies. Your Polar Star should reach max experience here.
  3. 3
    Continue right until a cutscene, then proceed to the door leading to Cthulhu's Abode.
  4. 4
    Save at Cthulhu's Abode and exit through the top door.
  5. 5
    Jump across gaps to reach a Life Capsule on a ledge, then continue right.
  6. 6
    Platforming becomes trickier; reach Egg No. 06 and enter the alcove.
  7. 7
    Inside Egg No. 06, open the chest to find the ID Card. Exit the egg.
  8. 8
    Continue east in the Egg Corridor. You'll be attacked by a larger flying bug; defeat it and enter the next door.
  9. 9
    Enter the Egg Observation Room. Save here. Take the elevator to the bottom floor and note the red monitors, which indicate bad eggs (Egg No. 06 and Egg No. 01).
  10. 10
    Take the elevator to the top floor and open the chest to obtain Ze Missiles. Save and exit.
  11. 11
    Back in the Egg Corridor, enemies can now drop missile refills. Level up your missiles by shooting with the Polar Star and collecting crystals.
  12. 12
    Head to Egg No. 01 and enter it.
  13. 13
    Use the ID Card to activate the terminal inside Egg No. 01.
  14. 14
    The red barrier is now gone, allowing access to Igor.
  15. 15
    Boss Fight: Igor
    • Igor charges and stomps; jump over him.
  16. 16
    He performs a quick jab if you get too close.
  17. 17
    When his health is low, he fires projectiles from his mouth; distance yourself or jump behind him. These projectiles are destructible.
  18. 18
    Strategy: Use missiles on Igor until he jumps, then jump over him. Use the Polar Star to destroy his projectiles. Don't worry about exhausting missiles, as a refill station is nearby.
  19. 19
    After defeating Igor, enter the first door (the save room is locked).
  20. 20
    Inside Egg No. 00, talk to Sue Sakamoto.
  21. 21
    Follow Sue back to the Egg Corridor.
  22. 22
    Enter the now-open rightmost door to the Side Room.
  23. 23
    Heal, save, and restock missiles in the Side Room.
  24. 24
    Return through the Egg Corridor, using the save points in the Egg Observation Room and Cthulhu's Abode.
  25. 25
    At the end of the Egg Corridor, take the teleporter back to Arthur's House.
Tips
  • The white spikey projectile in the beginning is a one-hit kill.
  • Enemies in the early part of the Egg Corridor can max out your Polar Star's experience.
  • Enemies later in the corridor drop many power-ups.
  • Missile refills can now be found from enemies or refill stations. Prioritize leveling up your missiles.
  • The refill station in the Side Room is crucial for preparing for the return trip.
  • ID Card
  • Ze Missiles
  • Defeat of Igor

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