Super Metroid/Items

Overall Items

 * Energy Tank: Each Energy Tank increases your maximum energy capacity by 100. Energy can be refilled at your ship, Energy Stations, and enemies may leave refills for 5 points or 20 points.

Power-ups
By defeating enemies, there's a chance that a power-up will appear to replenish any missing ammo or health. There are two types of health power-ups: small (5 energy) and large (20 energy). Ammo comes in the form of missiles (2 per power-up), super missiles (1 per power-up), and power bombs (1 per power-up).

Normal

 * Hi-Jump Boots: These are acquired in Norfair. They will increase Samus’s jump height to twice as high as previously.


 * Varia Suit: Obtained after defeating Kraid. The Varia Suit cuts damage to Samus in half and allows her to survive heated rooms.


 * Gravity Suit: Obtained after defeating Phantoon. The Gravity Suit allows Samus to move normally through liquids (magma and water).


 * Screw Attack: Obtained after defeating Ridley. The Screw Attack allows Samus to somersault in the air indefinitely; also giving her temporary immortality and the ability to damage units while spinning.

Missles

 * Missiles: Each pack of Missiles you acquire will increase your total by 5, for a maximum of 230. Shooting 5 of them at a red door will open it, and they work much better than most of your early beams to kill enemies with.  Missiles can be refilled at your ship, Missile Stations, or refills can be acquired by defeating enemies.  Enemy-dropped refills are worth 2 missiles each.


 * Super Missile: The Super Missile is acquired after defeating Spore Spawn. It has a much higher damage output than regular Missiles, and travels faster.  Each Super Missile pack will increase your total by 5, up to a maximum of 50.  Super Missiles can open Green Doors, Green Gates, and can destroy Super Missile Blocks.

Beam Related

 * Charge Beam: This weapon allows you to charge your regular beam. A charged shot will damage bosses, which normal shots won’t, and requires no energy or ammunition.


 * Spazer: The Spazer splits the regular beam into three blasts, and it greatly increases both the power and accuracy of your beams.


 * Wave: Causes shots to fire in a wave-like motion. Using this in combination with the Spazer enables all three beams to move in this fashion.


 * Ice Beam: Causes shots to freeze enemies, sometimes charged shots must be used to freeze them; turns the beam color to blue.


 * Plasma Beam: Causes shots to be more powerful while also passing through objects; turns the beam color to green.


 * Hyper Beam: Acquired during the Mother Brain fight. Causes Samus to flash, all shots to be charged and more powerful than any other weapon.

Morph Ball Related

 * Morph Ball: After acquiring this, Samus will be able to morph into a ball to traverse narrow passages.


 * Morph Ball Bomb: These are guarded by a Torizo statue. Once acquired, you can plant up to three bombs at a time.  The explosion can also bounce the morph ball a short distance into the air.


 * Power Bomb: Power Bombs damage everything on screen, including things somewhat offscreen. Yellow doors can only be opened with a Power Bomb.  They can also be used to affect the environment in some areas.


 * Spring Ball: Allows Samus to jump while in Morph Ball form.