Empty door

An "empty door" is a type of door that is permanently open; that is to say, it lacks an energy shield or hatch cover, and does not require a shot to open.
==Appearances==
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, such as Ingworms, rock slides, etc. It is possible that these were originally functioning doors before their destruction.
In Metroid Fusion, the first hatches that Samus must walk through upon landing aboard the B.S.L Research Station are hatchless empty doors. Later, when Nettori's vines grow over the Reactor Silo, Samus must pass through more empty doors to proceed due to these hatches losing power.
It is unknown if these doors were intentionally left open, or simply malfunctioned. In the former's case, this was done likely to prevent accidental lockouts in case of emergency.
==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. These doorways are blocked off mainly to prevent falling into an otherwise empty void.
:*Despite being blocked off, most of these doors still function properly and load their correct corresponding rooms. 
:**The empty door found between Trial Tunnel and Trial Grounds is still functional and connects the two rooms together. This hints at a scrapped puzzle that would be required to obtain the first Agon Temple Key.
:**Two empty doors exist within Dark Torvus Temple Access and connect both Venomous Pond and Dark Torvus Temple together. This hints at a possible altered layout.
:**Though possibly not an empty door, collision data exists between Cache B and Undertemple Shaft and passing through this data will load these two rooms properly along with their correct soundtrack.
*In Metroid Prime, the large open cave connecting Subchamber Four and Five could be considered an Empty doorway as both rooms are loaded and Samus must walk through the open cave to load the corresponding room on the Map. These two rooms are the only rooms within the Impact Crater that don't contain a Red Door and require Samus to transition between them manually. All other instances between Subchambers involve a cutscene to transition between rooms.
==Gallery==
Trial Tunnel Empty Doorway.png|Trial Tunnel
Hive Portal Chamber Unused Door to Staging Area.png|Empty, unused doorway in Hive Portal Chamber leading to Staging Area. Curiously does not load the latter. 
Category:Doors
Category:Dark Aether
Category:BSL
Category:Main Deck