Cave Story/Items

Weapons

 * Polar Star - Obtained from the hermit's shack in the First Cave. This is the simplest and weakest weapon in the game.
 * Level 1 - Shoots a single bullet that does 1 damage.
 * Level 2 - Shoots a double bullet that does 2 damage.
 * Max level - Shoots a large bullet that does 4 damage and flies farther than the other levels.
 * Fireball - Found in Santa's house in Grasstown after letting him into his house. This one is good for shooting up hills or attacking enemies below, but for straight shots and airborne foes it doesn't do a lot of good.
 * Level 1 - Shoots a single fireball that does minimal damage.
 * Level 2 - Shoots an orange fireball that does moderate damage.
 * Max Level - Shoots a blue fireball that does a high amount of damage.
 * Machine Gun - Curly gives this to you in exchange for your Polar Star after you defeat her in the Sand Zone. It fires quickly, but its ammo is limited and must recharge.
 * Level 1 - Fires small bullets that do 1 damage each.
 * Level 2 - Fires larger bullets that do 2 damage each.
 * Max Level - Fires very large bullets that do 4 damage each. In addition, this level adds recoil to the weapon - you will be pushed back for every shot you make. This effect can be used to hover in the air by shooting downwards.
 * Upgrades - there is an item that you can pick up that will speed up the charge time on this weapon.
 * Bubbler - A bubble-blowing pistol. It seems weak at first, but leveling it up gets you a fairly powerful weapon.
 * Level 1 - Short range, weak power.
 * Level 2 - Range nearly doubles, more power, and rapid fire.
 * Level 3 - Hold the Fire button to summon bubbles. Release it to send them all in whatever direction you're aiming to make a powerful shotgun-type blast. There is a limit to how many bubbles you can summon at once - when this limit is reached, the bubbles will start shooting forward by themselves.
 * Snake - If you choose not to take Curly's machine gun, you can obtain this weapon by speaking to the cockroaches in the Labrynth. The shopkeeper will combine your Polar Star and Fireball weapons to make this powerful weapon.
 * Spur - If you decide to ignore the cockroaches' offer and skip over the Snake, you can get this weapon by returning to the First Cave and speaking to the Hermit.
 * Missile Launcher - A powerful weapon, but its ammo is very limited.
 * Level 1 - Launches a small missile that does moderate damage.
 * Level 2 - Launches a large, very fast missile that does a high amount of damage.
 * Level 3 - Launches three small missiles at once, while still only using one ammo.
 * Super Missile Launcher - An upgraded version of the Missile Launcher that you find in the Labrynth. Power levels are the same as the Missile Launcher, except they do much more damage.

Field Items
Save Disk Pressing on this item will save your game. Can usually be found near servers.

Server (Health Restore) This item, called the server, will restore your health when you press  on it

Treasure Chest Pressing on this item will open it, usually revealing a present inside.

Single Heart This Item, which can be gained from defeated enemies, will restore your health by 2 points.

Multiple Hearts This item, which can be gained from defeated enemies, will restore your health by 5 points.

Heart Tank Pressing on this item will pick it up and add 3 points to your health bar.

Energy (Small) This item is dropped by defeated enemies and adds 1 experience point to your currently equiped weapon.

Energy (Medium) This item is dropped by defeated enemies and adds 5 experience points to your currently equiped weapon.

Energy (Large) This item is dropped by defeated enemies and adds 20 experience points to your currently equiped weapon.

Energy Box This item can be opened with a single shot from any weapon. When opened it releases varying amounts of energy.

Missile Picking up this item will refill your missle supply by 1 missile. Works with both normal and super missiler

Multiple Missiles Picking up this item will refill your missle supply by 3 missiles. Works with both normal and super missiler

Missile Powerup Pressing on this item will pick it up and increase the amount of missiles you can carry by 3.

Super Missile Powerup The exact same as the missile powerup, but the color is changed to reflect the color of the super missiler

Event Items
These items are used in conjunction with the story or are just fun little secrets to find. Unlike other items, these ones can usually only be found once and in special scenes. There are two types of event items: Normal event items, which are found throughout any game and hard event items, which are only used when you are attempting to reach the hard ending. You must collect ALL hard event items to reach the hard ending.

Normal Event Items
The map system can be accessed from the item menu or by pressing W on your keyboard. Found in the Mimiga Village, it allows you to see the map layout of any area you are in.
 * Map System "So long as you retain your spirit of exploration, surely you shall find your way out. This I believe."

Found in at the bottom of the Resevoir, this locket was a gift from Sue to Tokoro as a symbol of their friendship. Tokoro lost it and would really like it back.
 * Silver Locket "A silver locket in the shape of a fish. From the condition it’s in, it looks like it’s been treasured for years."

Arthur's Key is found in the Graveyard of the Mimiga Village. You can get it by pressing on Arthur's grave. It is used to open the door to Arthur's house.
 * Arthur's Key "The key to Arthur’s house. It was hidden near Arthur’s gravestone."

The I.D. card is found in Egg No. 006 and is used at the computer in Egg No. 001 to open the force field to reach Egg No. 00. There is no other purpose for it.
 * I.D. Card "An ID card found in Egg No. 06."

Santa's Key is found in Grasstown, in an area a few screens from where you talk to him. It is pretty hard to miss, as it is surrounded by many enemies. Give it to santa for him to open his house, which is required to get another item.
 * Santa's Key "The key to Santa’s house."

This is the first extra item that you can get in the game. To get it, examine Chaco's fireplace the FIRST time you go into her house (Otherwise it will not work), then immediately go to sleep on her bed. When you wake up you will have it.
 * Chaco's Lipstick "Red lipstick. It has no use."

The jellyfish juice is one of the few event items that can be refilled as many times as you want. You can get it by defeating the large jellyfish in the area where you found Santa's key. It is used to put out fires.
 * Jellyfish Juice "A fluid that can quench fireplaces."

Given to you by a strange man stuck in a house in Grasstown. The rusty key doesn't open his door but it will open the door to the power generator room right below the cliff you used to drop into the area.
 * Rusty Key "A Rusty Key"

This item will be given to you by the same man who gave you the rusty key. He will only give this to you after you talk to the robot in the power generator room. It is used to unlock the door to the Gum Area.
 * Gum Key "A tag says Gum"

One of the items required for explosive, it is found in the chest in the Gum Area. A word or warning however, as opening the chest will initiate a boss fight with Balrog.
 * Gum Base "A clump of gum."

Another item required to make the bomb, this item can be gained by using jellyfish juice on Santa's fireplace. You don't have to talk to the robot before getting this item however, so you might want to get it before you go over the cliff.
 * Charcoal "Taken from a fireplace."

Once you get all the items, talk to the robot again and he will make you the explosive. You then use the explosive to blow up the door and free the man trapped inside the house.
 * Explosive "An explosive for blowing up doors and such."

Hard Event Items
Found in the Core battle area. The only way to get this item is to go to the bottom right corner of the room before talking to curly about the killer robots. The tow rope is used to save Curly after the battle with the Core.
 * Tow Rope "A tow rope for robots."