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This article is about locking mechanisms on doors. For the object in the Combat Hall, see Blast and Sniper Shields.
Chozo Ruins Screenshot (84)

A Tallon IV Locked Door

Blast Shields[1], also known as Locked Doors[2], Shield Doors[3] and Sealed Doors[4], are shields or locks placed over doors throughout the Metroid series.

Indestructible Blast Shields[]

These are completely invulnerable to any weapons fire. They are commonly used to contain enemies or other threats, and do not open until the threat is removed or when another task has been completed. Sometimes, a door can become permanently shut with a Blast Shield, forcing Samus Aran to find an alternate route.

They are replaced by Sealed Doors in Metroid Prime Hunters. An object named Blast Shield appears in the Combat Hall room, but it is merely an unrelated structure used for combat training. Their counterpart in 2D Metroid games is the Metal Door, although doors visibly lock during boss battles in Metroid: Samus Returns.

Locked door

The unique one-way door, Main Plaza.

In Metroid Prime, a unique locked door is present in the Main Plaza and Connection Elevator to Deck Alpha. These are one-way doors that prevent Samus from returning to the previous room.

In Metroid Prime 2: Echoes, a locked door can be unlocked if opened from its opposite side.

Samus Aran's Gunship also has a Blast Shield in Metroid Prime 3: Corruption, which is activated from the inside. If Samus activates it, a Blast Shield locks around the ship's windshield, protecting it.

In the same game, numerous doors in the Pirate Homeworld (such as in the Command Courtyard) seem to be permanently locked and act similarly to a Blast Shield, blocking off access to areas that only Space Pirates seemingly have access to. This may be the Space Pirate version of a Blast Shield, like those found on other planets in Corruption.

In rooms near the Breeding Room in Sector 1 / Biosphere on the BOTTLE SHIP and the main room of the Bioweapon Research Center, there are doors with dull lock colors, that Samus cannot open (although those near the Breeding Room are compromised after MB's death, and MB opens the one in the Center for Samus to access in a cutscene only).

Destructible Blast Shields[]

The term "Blast Shield" is also used to refer to other door locks in the Metroid Prime trilogy. These types are made of more fragile materials and so can be removed, unlike the normal Blast Shields. The Blast Shields are color-coded according to the specific concussive weapons used to destroy them. Once the shield is removed, the door within is accessible.

In the main trilogy, these Blast Shields can be found in such colors as Red, Green, Yellow, White, and Purple. Red, Green, and Yellow Blast Shields correspond directly to doors seen in the 2D Metroid games.

In Echoes, primarily due to design, if a door is covered with a destructible Blast Shield (mostly on both sides), opening said door will also remove the shield on its opposite side (if any).

Hunters features its own set of Blast Shields, which correspond to each of the Affinity Weapons, excluding the Shock Coil. These Blast Shields are Red, Green, Yellow, Purple, Brown, and Orange. Brown Blast Shields in Hunters are functionally identical to the Red Blast Shields in Corruption.

Official data[]

Logbook entries[]

Locked Door scanpic - RemasteredLocked Door scanpic
RemasteredOriginal

Locked Door

Metroid Prime

Logbook entry

Lock system engaged. Secure the area to unlock door.

Blast Shield

Metroid Prime 3: Corruption

Temporary scan

Blast Shield lock engaged.
It is invulnerable to even the heaviest of weapon fire.

Logbook entry

Blast Shields are invulnerable to all types of weapon fire. Some are engaged when hostiles are detected and will only open once the threat has been eliminated. Others will sometimes remain shut and force you to find an alternate route.

[Remastered][Original]

Scans[]

Echoes
"Door system access denied. Unable to bypass security codes. Seek an alternate exit."

Trivia[]

  • In the Metroid Prime Trilogy edition of Echoes, Locked Doors will turn white upon locking rather than appearing de-energized, resembling white hatches.
  • Within certain areas of Metroid Prime, if Samus shoots at a door but does not open it, when a scripted Blast Shield activates over said door, the door can still be opened when approached, leaving the Blast Shield to float in between the open door (see Gallery below). It is still not possible to move or fire past a floating Blast Shield however. In Echoes and Corruption, doors will reset themselves before a Blast Shield lock is engaged.
  • In Echoes, the Phazon bullets (obtained outside of the Sky Temple Gateway via hacking) can open locked doors and is perhaps the only weapon in the entire Metroid franchise to bypass locked doors. Should a locked door be opened using this method, Samus can pass through the lock and the door itself.
    • Sometimes when this is done and Samus returns to the same area where the door lock originated from, the game has a tendency to crash due to programming and depending entirely on the situation. Crashes like these tend to occur more often on the GameCube versions of Echoes. In Trilogy editions where the game has alternate data handling, crashes are less likely to occur from rooms loaded in this fashion but still carry the potential to softlock the game entirely.

Gallery[]

References[]



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