Cave Story/Walkthrough

The Start Caves

 * Go up and out of the first room.
 * Go left and follow the path all the way to the bottom. BE CAREFUL of spikes because you are probably not used to the slide physics and get your first heart container on your way down.
 * Go into the lion’s head at the end of the path.
 * Get the polar star in the chest.
 * Follow the path back up and when you get back to the door, you can either go in and save or proceed right and shoot out the bricks and the eye door. Enter the door once you have defeated it

The Mimiga Village

 * After viewing a short dialog between Toroko and King, go all the way up and right to the farm.

The Farm

 * Follow the path all the way to the left and drop down into the well to grab the heart container.
 * Go back out the way you came.

To the Resevoir!

 * From the farm entrance, proceed left until you reach the door which is located right next to the spot where you fell.
 * Enter the door.

The Resevoir

 * Follow the path to the left, you can either go onto the platforms and talk to the Migma or go underwater, it doesn’t matter.
 * Shoot the fish in front of the sparkling tile. Press down on the tile to get the Silver Locket.
 * Proceed back to the entrance, you will see Toroko run out into the village.
 * Follow him.

Finding the Shack

 * After a brief dialog between Toroko and King, Toroko will run away yet again.
 * Proceed down to the bottom right and enter the house located there.

Shack

 * Walk forward and Toroko will attack you, shoot her once and she will fall.
 * Talk to her to trigger the next scene in which Toroko is kidnapped by Balrog and Misery.
 * After Toroko is kidnapped, you have the option of either fighting Balrog or not
 * Boss Fight - Balrog: Just shoot him and jump over him when he charges at you. If he hits you, he will grab you and cause 2 points of damage. Be wary of when he jumps in the air because he could connect with you as you are jumping. The reward for fighting Balrog is 5 experience points for your weapon.
 * Head out of the shack

The Map & Finding Arthur's Key

 * From the shack entrance walk left until roughly the middle of the level where you encounter a long vertical shaft. Climb it to reach the save point.
 * From the save point, walk right a little bit until you reach a gap in the platform, fall down the gap and land on the suspended platform below it and to the right
 * From the platform, carefully jump to your right to reach a treasure chest, inside the treasure chest is a map system and the note: So long as you retain your spirit of exploration, surely you shall find your way out. This I believe.
 * Fall down and proceed to climb the vertical shaft again
 * Again walk to your right, but this time jump over the gap and proceed to the right and talk to the mimiga guarding the door.
 * After talking to the mimiga, he will walk away and go into a nearby house, follow after him into the house.
 * Talk to King for some insight about Tokoro’s past and talk to Jack for a hint as to where the key is.
 * Exit the house, go right and enter the door that Jack was guarding

Graveyard

 * Follow the path in the graveyard, but be careful of all the enemies
 * To defeat the knife brandishing enemy, jump over him and shoot him from behind
 * Continue along the path and up onto the platforms, don’t worry about the unreachable door, you won’t be able to go into there until much later
 * Jump up onto the platform that contains Arthur’s grave, press down on the sparkling tile to get Arthur’s Key
 * Exit the Graveyard

Where is Arthur's House?

 * Go to the bottom left corner and use Arthur’s key to enter the house

Arthur's House

 * You can choose to save in Arthur’s house
 * Walk over to the lit computer and press down to read what is on the screen
 * Choose yes to open teleportation to the Egg Corridor
 * You can also walk down and examine the bottom right corner of his house. You will get the message: …Flowers?
 * Walk up to the teleported and press down in front of it. Choose the Egg Corridor and you will be teleported there.

The Egg Corridor

 * When you first enter the egg corridor, you will notice a heart container below you. To reach it, head to the left and go down the vertical shaft but DO NOT touch the bottom, because the creature moving left and right is invincible and will kill you in one hit. To reach it, jump down right after the creature hits the left wall and starts heading away, follow it then jump onto the platform. To get back, jump down after the creature passes you and heads towards the right, then run back to the vertical shaft.
 * Follow the path to the right, there is only one way to go, so it is near impossible to get lost.
 * Killing all the enemies without getting hit should give you a maxed out level 3 polar star, which will be very useful later in the level.
 * Jump over the pillar to view a dialog between Sue and a monster, after she is abducted, continue to follow the path until you reach a save room.
 * Enter the save room, then proceed upwards in the room by shooting the breakable boxes, the higher door will lead you to a series of platforms containing a heart container. You should also talk to the man inside the save room and he will remark A soldier…you’ve lost your memory? Ohohoho…
 * Exit the save room and continue along the path. At no point should you ever go into the lower corridor with the instant death creature.
 * When you reach area around the 6th egg, wait for the instant-death creature to pass, then drop down one of the holes and run and jump into the chamber containing the egg marked 6. Jump up towards the center of the egg and you will be brought to a special room with a treasure chest. Grab the chest to get the I.D. Card
 * Exit the egg, wait for the instant-death creature to pass then make a run for the hole you used to jump down into the lower corridor
 * Follow along the path until you reach another save room, enter it
 * Save, then take the elevator to the highest floor in the save room, walk all the way to the end and open the treasure chest to get the Missile Launcher. Additionally, you can examine the bed on the 2nd floor to get the message: Red petals scattered about. You can now exit the save room.
 * Follow the path all the way to the end, where you will reach a barrier blocking you from going any further.
 * Once again, drop down into the lower corridor (right in front of the barrier) when the instant-death creature passes you and make a run to the 1st egg. Enter the egg the same way you did before
 * Go to the computer and press down to insert the I.D. Card and lower the barrier. After it is lowered, exit and proceed back up to the barrier
 * Hop over the barrier and walk down until you encounter the monster that kidnapped Sue again.
 * Boss Battle - Igor: Use the same tactics that you used for the first fight against Balrog. The only real difference is that he may occasionally open his mouth, in which you should either jump over him immediately or run away. He will shoot balls of energy out of his mouth which will cause 2 points of damage each. Also, he will cause 2 points of damage whenever he comes into contact with you. If you have a level 3 polar star this battle will not be hard.
 * Enter the left-most door.

Egg No. 00

 * Walk over and talk to Sue
 * After she leaves, exit Egg No. 00
 * Secret: Walk over to the right most part of the screen and press down, you will feel a cold wind blowing into the room.

Exiting the Egg Corridor

 * You can now enter the save room, if you want to save and refill your health and missiles (Side Room)
 * Head back to the warp, but be careful, as there are lots more flying enemies around, although it is an excellent chance to level up your missile launcher
 * Warp back to Arthur’s house

Arthur’s House

 * Before you enter, you will view a conversation between Sue and her brother Kazuma
 * You can exit the house and go talk to Sue in her cave right about the Village save point, she will ask you to go rescue her brother for her
 * Go back to the teleporter and warp to Grasstown