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A Door (or Hatch) is a pathway which leads Samus into new rooms. They have appeared in every Metroid game to date except Metroid Prime Pinball. Doors almost always feature low-level energy shields that can be disrupted by weapons fire. The most common type of door is the Blue Door, which can be opened with any type of weapon.
Many doors are covered with Blast Shields, which must be destroyed with a certain type of weapon before the door itself can be opened. The most common blast shield is the Red Blast Shield, which requires a Missile to open (in the original Metroid, and Super Metroid they had to be opened with 5 missiles).
In Super Metroid, on board the Ceres Space Colony, there are doors that automatically open if someone is nearby. They do not require to be shot to open. They do appear to have a fail-safe protocol and automatically lock themselves, seen during the battle with Ridley.
In Metroid Fusion, the security hatches in the BSL station did not require specific weapons to open. Instead, Samus had to unlock each type of hatch in special Security Rooms hidden in various parts of the station. After each type of security hatch was unlocked, they could be opened with any weapon.
In Metroid: Other M, doors are either green, red or orange. Green doors are doors that can be opened, red are doors that cannot be opened, and orange doors require a certain action to open. There are also types of Super Missile shields, Seeker Missile Shields, and Missile Shields. Doors now open automatically once unlocked and do not need to be shot, similar to those in the Ceres Space Colony.
Encountered in Metroid: Zero Mission and Super Metroid. These doors will not open until a specific task has been completed, such as in Tourian, where the doors lock when there are Metroids to be defeated.
White-fringed doors that are opened with the Ice Beam. Found in Metroid Prime.
Red and Orange DoorsEdit
Purple-colored doors that are opened with the Dark Beam. Found in Metroid Prime 2: Echoes.
Black-and-white-colored doors that are opened with the Annihilator Beam. Found in Metroid Prime 2: Echoes.
Blast Shields are found covering normal Blue Doors throughout the Metroid series. There are several varieties that all require Samus Aran to use different weapons to destroy them. Once they have been destroyed, however, all Blast Shields are gone for good.
These red-colored blast shields are found in Metroid, Metroid II: Return of Samus, Super Metroid, Metroid: Zero Mission, Metroid Prime and Metroid Prime 2: Echoes. These doors are opened with 5 normal Missiles or a single Missile (in Zero Mission, Prime and Echoes only). They can also be opened with 1 Super Missile.
Green Hatches from Super Metroid, Metroid: Zero Mission, and Metroid Prime 2: Echoes. These require one Super Missile to open.
Blast shields that can only be destroyed by hitting all of the locks simultaneously with Seeker Missiles. Found in Metroid Prime 2: Echoes, Metroid Prime 3: Corruption, and Metroid: Other M.
These blast shields can be found in Super Metroid, Metroid: Zero Mission and Metroid Prime 2: Echoes. They can be opened with a Power Bomb.
These blast shields are found in Metroid Prime 3: Corruption. They are vulnerable to the Ice Missile and possibly other cold-based weaponry, although this has yet to be proven.
Blast shields that are destroyed by using the Grapple Lasso to generate enough stress to pull them from their mounts. Found in Metroid Prime 3: Corruption.
First encountered in the Celestial Archives, Brown Blast Shields replace Red Blast Shields in Metroid Prime Hunters, (instead red blast shields were used for the Imperialist.) and, like in the rest of the Prime games, they require one Missile to destroy. There is only one in the entire game, as well as the entire series.
Instead of having Doors or Blast Shields that require different weapons to open, the BSL station is equipped with various levels of security hatches. Areas that are hazardous or are crucial to the station's operations are often placed behind high-level hatches. In order to open them, Samus Aran must first find the appropriate Security Room and manually unlock the security level.
This is the lowest security level; hatches of this level are gray in color, and are the most common hatch seen on the station. Adam is able to unlock this level at the beginning of the game.
This is the fourth security level; hatches of this level are yellow in color. Adam asks Samus to unlock the Yellow Hatches in Sector 5 so she can reach the Ice Missiles. They do not exist outside of Sector 5.
This is the fifth and final security level; hatches of this level are red in color. Adam never authorizes Samus to open Red Hatches in Sector 4, but she is forced to do so in order to get the Diffusion Missiles and return to a Navigation Room.
This door appears in Metroid Prime and Corruption. Occasionally, some doors will not be active and Samus cannot use them. To restore power, she must energize one or more Power Conduits in the area with her Wave Beam in Prime, or weld back the missing wires with her Plasma Beam in Corruption.
This organic door appears in Corruption. They appear in Leviathan Seeds, and have a bone plate that retracts when shot.
This organic door appears in Corruption. It is a maw and appears only on Phaaze, hence the name, and is similar to a Leviathan Door. The scan says it can only be opened with the Hyper Beam, but it is actually vulnerable to any weapon.
This door appears in Hunters. It looks like a typical door, but with a spinning red lock on it. They behave exactly like Blast Shields.
This door appears in most 2-D Metroid games. It is not actually a door, rather, it is a pole that is triggered when a switch or a certain location is shot.
This door appears in Hunters. Arguably the largest door in the Metroid series, it has an electronic force field and behaves like any normal hatch. When shot, the color will dull, and it will slowly open. It most resembles a Leviathan/Phaaze Door.
This door appears in Echoes. It is a gate with a hologram of a message written in Luminoth (that reads GATE), and must be opened by scanning it. As Samus continues on, she will have to continually upgrade her Translator Module to read the hologram, which is in different colors (violet, amber, emerald and cobalt).
This door appears in Echoes. It appears to be a Luminoth-made door, as it only appears if Samus tries to leave the area she is in without returning the Energy to the Energy Controller, or if, in the Great Temple, she tries to avoid speaking to U-Mos.
"Orange"/"Purple" Blast ShieldsEdit
There are two Blast Shields of notable mention in the original Metroid. They are unnamed in the guides, and both are the only of their kind in the entire game. Both require 10 Missiles to open. The "Orange Blast Shield" appears in Tourian at the bottom of the first shaft. The "Purple Blast Shield" appears in Ridley's chamber, blocking the way to a room with an Energy Tank.
- In the Prime series, the doors acted as hidden loading screens, which is why some of them take so long to open.
- The doors of Elysia in Metroid Prime 3: Corruption strongly resemble the doors of Metroid Prime. This is probably because both planets were also old Chozo colonies.
- The doors of the Pirate Homeworld in Metroid Prime 3: Corruption also bear much resemblance to the doors in the classic games.
- In Metroid Prime 2: Echoes, if a Metroid touches a door, it will explode instantly.
- According to a scan, the Phaaze door can only be opened by a burst of Phazon. However, the scan is actually false; if Samus stands still without engaging the "permanent Hypermode", aims at the first door, and shoots it with the Nova Beam, its surrounding aura will disappear.
- In Metroid: Other M, if an enemy somehow escapes their original room by exiting through an open door, they will attempt to return to their original room (provided they aren't attacking Samus) and "phase" through the wall.
- Metroid Prime is the only three-dimensional game in which doors are placed vertically as well as horizontally. Super Metroid is the only two-dimensional game to have this feature.
Metroid Prime Hunters scanEdit
"A weak energy shield surrounds the door to keep out roaming creatures. Any weapon will open this door."