Empty door



An Empty Door is a type of Door without some type of Energy shielding or Hatch covering over it.

Appearances
In Metroid Fusion upon landing aboard the B.S.L Research Station, the first doors Samus must walk through are hatchless Empty Doors. Later when Nettori's vines chokes the Reactor Silo, Samus must pass through more Empty doors to proceed due to Hatch Doors losing power.

It is currently unknown if these Doors were intentionally made to be Empty Doors, or simply a malfunction caused them to be. In the former's case, this was done likely to prevent accidental lockouts in case of emergency.

In Metroid Prime 2: Echoes, Empty Doors exist almost all over Dark Aether. However these doors cannot normally be seen, as all of them have been blocked off by some type of obstruction (Mutated Ingworms, rock slides, etc.). It is possible that these were originally normal functoning doors before their destruction.

Trivia

 * In Fusion, the Empty Doors between the first Navigation Room and the Docking Bays have a locking Hatch that is placed during the Escape Sequence.
 * In Echoes, the reason for these doors existing is likely due to a room being a copy of its Light World counterpart. Ultimately, some Dark World counterparts of rooms either went unused or were never created.
 * Despite being blocked off, the Empty Door found between Trial Tunnel and Trial Grounds is still functional and connects the two rooms together.