This article is about the Door sealing mechanism which is invulnerable to weaponry. For the Door shield that can be destroyed by Missiles, see Red Blast Shield.
Chozo Ruins Screenshot (84)

A Sealed Tallon IV Door

Locked Door Hive

A Sealed Aetherian Door

Sealed GF Door

A Sealed Galactic Federation Door

Blast Shields are shields or locks placed over doors. They appear throughout the Metroid Prime Trilogy and 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 to find an alternate route. They are replaced by Sealed Doors in Metroid Prime Hunters, though an object named Blast Shield appears in the Combat Hall room.

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 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 the Command Courtyard on the Space Pirate Homeworld, there are several doors that cannot be opened by Samus. These are entrances from unknown areas that only Space Pirates can access. 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 ShieldsEdit

Other kinds of Blast Shield also appear in the 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 and can be found in such colors as Red, Green, Yellow, White and Purple. A Brown Blast Shield is also found in Hunters, and, like it's red counterparts on Tallon IV and Aether, require only one Missile to unlock. Once the shield is removed, the door within is accessible. There are also other Blast Shields such as different versions of Red, Green, Yellow and Purple, and also Orange.

Logbook entryEdit

Locked Door scanpic

Locked Door

Metroid Prime

Logbook entry

Lock system engaged. Secure 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 alternative route.


"Door system access denied. Unable to bypass security codes. Seek an alternate exit."
"Used for projectile weapons training."


  • In the Metroid Prime Trilogy edition of Metroid Prime 2: Echoes, Sealed doors will turn White upon locking, as if they were Light Beam Doors.